"Rhachitis" Natural Recordings by Native Speakers
Rickets is a disorder caused by a lack of vitamin D, calcium, or phosphate. It leads to softening and weakening of the bones.
It most often affects children, particularly if they are exclusively breastfed and do not get enough vitamin D from sunlight or other sources, or if they have poor nutrition.
A relatively rare word!<br><br>A rhabdosome (from Greek ῥαβδός, rhabdos, rod or staff) is a type of multicellular skeleton found in some colonial organisms, particularly in certain species of colonial nematodes (roundworms), notably the genus Sabellaster and some species of hydroids (marine polyps).<br><br>In these organisms, a rhabdosome is a stiff, rod-like structure formed by the arrangement of several cells (typically, a cluster of ectodermal cells) around a central axis, providing support and protection to the organism.<br><br>In other words, a rhabdosome is a simple, rod-shaped skeletal structure made of multiple cells, found in a few specialized types of animal colonies, primarily serving a supportive function.
A rhabdosphere (also known as a fiber envelope or fiber sphere) is a theoretical concept in plant morphology that refers to the DNA and histone protein complex that forms a fiber-like structure in the nucleus of plant cells. <br><br>In plants, the rhabdosphere is a gel-like structure that is composed of a combination of histone proteins and deoxyribonucleic acid (DNA). Historically, some botanists have considered the rhabdosphere as equivalent to the nuclear envelope or the chromatin.<br><br>The term is not commonly used in contemporary cell biology and cellular genetics.
The Rhabdoviridae is a family of negative-sense single-stranded RNA viruses. They are enveloped viruses with helical symmetry, meaning that their genetic material is arranged in a spiral shape, and are typically filamentous in shape. Examples of viruses in this family include:<br><br> Rabies virus<br> Vesicular stomatitis virus<br> Ebola virus<br> Lyssavirus<br> Panchan virus<br><br>These viruses infect a wide range of hosts, including humans, animals, and birds, and can cause a variety of diseases, ranging from mild to severe.
Rhachiodont refers to a fossilized tooth of a fish of a past geological age, typically from the Jurassic period, often referring to the genus Rhachiodon, a type of extinct bony fish.
The term "rhachis" refers to the main or largest vein that runs along the midline of a leaf in plants. In botanical terms, it is the major mainstem or the longest and usually the largest rib of a compound palmate leaf, palmatisect leaves, or feather-leafed plants.
Rhacophorus is a genus of tree-frogs, commonly known as Asian tree frogs or microhylid frogs. The genus is native to Southeast Asia and parts of China. They have a distinctive large toe pads, which allow them to climb and perch on trees.
Rhaetia refers to a historical and geographical region in Central Europe, specifically in the southeastern part of modern Switzerland, northern Italy, and the Austrian state of Tyrol. It was a previously known Roman province and a medieval Duchy that initially belonged to the Kingdom of Burgundy. The name is derived from the Raeti people, a Celtic tribe that inhabited the region in the Iron Age.