Words Starting With "H"
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Hemianopia
Hemianopia is a type of visual field defect that occurs when a person loses the ability to see part or all of one half of their visual field due to damage to the visual processing areas in the brain. It can result from a variety of causes, including stroke, traumatic brain injury, tumors, or inflammatory diseases such as multiple sclerosis. Hemianopia can be partial, causing only a small deficiency in vision, or it can be complete, causing a complete loss of vision in one half of the visual field.
Hemianopic
Hemianopic refers to a type of visual field defect that affects one half of the visual field in each eye.
Hemianopsia
Hemianopsia is a type of visual field defect in which a person's peripheral vision is reduced or absent on one side of their visual field. It can be thought of as "looking through a tunnel" with a blind spot on one side. Hemianopsia can be caused by a variety of factors, including stroke, brain tumor, head injury, or other neurological disorders.
Hemiaplasia
Hemiaplasia is a medical term that refers to the condition where there is an absolute absence or underdevelopment of half of a limb or digit. It is a type of congenital anomaly, meaning it is present at birth. In individuals with hemiaplasia, the affected limb is typically smaller than the normal counterpart and may be absence of certain muscles, bones, or other structures. This condition can occur on either the upper or lower extremities, and the severity of the condition can vary widely from individual to individual.
Hemiarthroplasties
Hemiarthroplasties is a medical term that refers to a surgical procedure where only one joint is replaced with an artificial joint, usually a partial replacement of a hip or knee joint. In this procedure, the damaged or arthritic portion of the joint is removed and replaced with a prosthetic implant, leaving the surrounding bone and soft tissue intact. The goal of hemiarthroplasties is to relieve pain, improve mobility, and restore function in the joint.
Hemiarthroplasty
Hemiarthroplasty is a type of surgical procedure where only one side of the joint is replaced with an artificial prosthesis, typically to relieve pressure and alleviate pain in the affected area. It is often used to treat osteoarthritis, particularly in the hip or shoulder, when the joint is worn out but other structures such as muscles, tendons, and ligaments are still intact.
Hemiascomycetes
Hemiascomycetes is a class of fungi in the subphylum Pezizomycotina. It includes yeasts, which are single-celled fungi that can reproduce by budding or fission. The term "Hemiascomycetes" comes from the Greek words "hemi" meaning "half" and "skomos" meaning "ashen", referring to the typically ashy appearance of the fruiting bodies of some members of this group.
Hemiasomatognosia
Hemiasomatognosia is a rare neurological disorder characterized by a lack of awareness or recognition of certain parts of one's own body. The affected individual may have difficulty identifying the affected limb or side of the body, and may even deny that it belongs to them. It is often associated with other cognitive and sensory impairments, and is usually caused by damage to the brain's parietal lobe or other areas involved in body awareness.
Hemibalism
Hemibalism is a rare neurological disorder characterized by a tendency to favor one side of the body, but not as extreme as hemiparesis (weakness on one side) or hemiplegia (paralysis on one side). People with hemibalism may exhibit involuntary movements, incoordination, and difficulties with balance and spatial awareness.
Hemiballism
Hemiballism is a rare neurological disorder characterized by abnormal involuntary movements, specifically tremors and chorea (involuntary jerky movements), predominantly affecting one side of the body. The term "hemiballism" literally means "half-ballism", with "hemi-" referring to half and "ballism" referring to the sudden, jerky movements of the affected limbs.
Hemiballismus
Hemiballismus is a rare and severe neurological disorder characterized by involuntary, swinging movements of the arm on one side of the body. It is typically caused by a lesion or damage to the subthalamic nucleus, a region deep in the brain that is involved in motor control. The movements are often dramatic and can be quite distressing for those who experience them.
Hemiblock
Hemiblock is an irregular heart rhythm characterized by a blockage of electrical signals in the heart, typically occurring in the right bundle branch. It impairs the heart's ability to pump blood efficiently, often causing symptoms such as rapid or irregular heartbeat, shortness of breath, fatigue, and dizziness.
Hemicardia
Hemicardia refers to a type of abnormal cardiac rhythm, specifically a type of atrial tachycardia that originates from the atrial muscle itself, rather than from the atrioventricular (AV) node. It is usually characterized by a rapid heart rate, often above 140 beats per minute, and can be associated with symptoms such as palpitations, shortness of breath, and lightheadedness. Hemicardia can be treated with medications, cardioversion, or other procedures depending on its underlying cause and severity.
Hemicellulose
Hemicellulose is a type of complex carbohydrate found in the cell walls of plants. It is a straight-chain polysaccharide made up of five-carbon sugars, such as arabinose, xylose, and glucose, that are linked together through beta-1,4 glycosidic bonds. Hemicellulose is broken down into smaller sugars by enzymes during the digestion process in the rumen of ruminant animals, such as cows and sheep, and is an important source of energy for these animals. It is also used in the production of biofuels, paper, and other products.
Hemicelluloses
Hemicelluloses are a type of complex carbohydrate found in plant cell walls, along with cellulose and pectin. They are a mixture of different sugar molecules, including xylose, arabinose, galactose, and glucose, which are linked together in a variety of ways. Hemicelluloses are typically more easily broken down by enzymes than cellulose, and they play an important role in the structure and function of plant cell walls. They also provide important nutritional and energy functions for animals, such as humans, who consume plants as a part of their diet.
Hemicerebrum
The hemicerebrum refers to the left or right half of the cerebrum, which is the largest part of the brain responsible for processing sensory information, controlling movement, and managing higher-level cognitive functions such as thought, emotion, and memory.
Hemicholine
Hemicholinium is a type of compound that was previously used as a muscle relaxant in the treatment of tetanus and other muscle spasms. It is a natural product obtained from the bark of the Guaiacum officinale tree.
Hemichordata
The Hemichordata is a group of chordates, a phylum of animals that belong to the superclass Ambulacraria. They are marine animals that are characterized by the presence of a dorsal, hollow nerve cord, a notochord (a precursor to a spinal cord), and pharyngeal slits. Hemichordates are commonly referred to as "worms" due to their elongated, worm-like bodies.
Hemichordate
Hemichordate refers to a group of marine animals that belong to the phylum Hemichordata. They are characterized by their three-part body (stomochord, dorsal hollow nerve cord, and pharyngeal gill slits), which is similar to that of chordates, including animals such as humans. Hemichordates are found mostly in marine environments and are often small, ranging from a few millimeters to tens of centimeters in length. Despite their similarities to chordates, hemichordates do not have a true horse-shoe shaped notochord, and are considered to be evolutionary relatives of chordates, but not chordates themselves.
Hemichordates
The hemichordates are a phylum of marine animals that are closely related to chordates, the phylum that includes humans and many other vertebrates. The name "hemichordate" comes from the Greek words "hemi", meaning "half", and "chorda", meaning "string". This refers to the presence of a notochord, a flexible, cord-like structure that runs along the length of the animal's body, similar to the notochord found in chordates.
Hemicircumference
Hemicircumference refers to half of the circumference of a circle or any curved object. It is a linear dimension that is half the distance around the entire circumference.
Hemicolectomy
Hemicolectomy is a surgical procedure where a doctor removes one half (hemi) of the colon (colectomy). It is typically performed to remove a tumor, diverticulum, or other abnormal growth that has formed in the upper or lower part of the colon.
Hemicolostomy
A hemicolostomy is a type of surgical procedure in which a section of the colon (intestine) is removed, and the remaining portion is anastomosed (joined) to the skin, allowing for the collection of feces in a pouch or bag. It is typically performed on patients with a certain type of bowel obstruction or cancer. The term "hemicolostomy" comes from the Greek words "hemi," meaning "half," and "kolon," meaning "colon," as well as the suffix "-stomy," which refers to a surgical opening or incision in the body.
Hemicorporectomy
Hemicorporectomy is a rare and complex surgical procedure that involves the removal of the lower half of the body, including the pelvis, legs, and some internal organs. It is usually performed in cases where a severe injury or disease affects the lower body, and is often considered a last resort. The goal of the surgery is to save the patient's life and improve their quality of life by removing damaged tissue and reducing pain. However, hemicorporectomy is a serious and life-altering procedure that requires careful consideration and patient selection.
Hemicrania
Hemicrania is a type of rare and strictly unilateral headache disorder, usually affecting only one side of the head. It is characterized by recurring, severe, one-sided headaches that are often described as throbbing or pulsating. The exact cause of hemicrania is unknown, but it is believed to be related to abnormalities in the nerve pathways that transmit pain signals from the head to the brain. Hemicrania is different from other types of headache disorders, such as migraines, which can occur on both sides of the head. Treatment for hemicrania typically involves the use of pain-relieving medications and lifestyle changes, such as avoiding certain triggers and practicing stress-reducing techniques.
Hemicrany
Hemicrania is a rare type of headache disorder characterized by severe, debilitating headaches that occur on one side of the head. The headaches are usually accompanied by tearing and redness of the eye and may be triggered by emotional or stress-related factors. There is no known cause for hemicrania, but it is often treated with medication and lifestyle changes.
Hemicycle
A hemicycle is a semicircular or semicircular-shaped room or building, particularly used in government and politics.
Hemicyonidae
Hemicyonidae is a family of extinct bears that lived during the Miocene and Pleistocene epochs. They were found on various continents, including Europe, Asia, and North America.
Hemidactyl
Hemidactyl refers to a type of lizard, specifically a genus of geckos with a specific type of toe arrangement. The name "Hemidactyl" comes from the Greek words "hemis", meaning "half", and "daktylos", meaning "finger" or "toe". It is used to describe the unique characteristic of these geckos, which have five toes on their hind feet, but only four toes on their front feet.
Hemidactylus
Hemidactylus is a genus of geckos, commonly referred to as house geckos or wall geckos. They are small to medium-sized lizards that are found in warm and temperate regions around the world. The name "Hemidactylus" comes from the Greek words "hemi", meaning "half", and "dactylus", meaning "finger", likely referring to the fact that the geckos' toes are half-wedged or half-opposed.
Hemidemisemiquaver
A musical term! <br><br>A hemidemisemiquaver is a musical note that lasts for half the duration of a demisemiquaver. In other words, it is an extremely short note that lasts for a very small fraction of a second.
Hemidesmosome
A hemidesmosome is a type of cell adhesion structure that connects a cell to the basement membrane, which is the layer of tissue that lies beneath the epithelium in many animal tissues. It is a partially attached structure that holds the cell in place and helps to anchor it to the surrounding tissue. Hemidesmosomes are typically found at the base of epithelial cells and play a crucial role in maintaining tissue architecture and function. They are composed of a series of proteins, including integrins and laminins, that interact with each other and with the basement membrane to form a strong and stable bond.
Hemidesmosomes
Hemidesmosomes are small, electron-dense structures found at the interface between a cell and its basement membrane, particularly in epithelial and endothelial cells. They are a type of adhesion complex that mediates the interaction between the cell and its surrounding environment, providing mechanical support and stability to the cell.
Hemidiaphragm
The hemidiaphragm is the half of the diaphragm, which is a dome-shaped muscle that separates the chest cavity from the abdominal cavity.
Hemiditone
A hemiditone is a half-step or a semitone, which is the smallest unit of measurement in music theory.