"Nepheline" Natural Recordings by Native Speakers
Nepheline is a type of mineral, a silicate of aluminum and sodium. It is a common mineral found in igneous rocks, particularly in the more alkaline types, such as nepheline syenites and urtites. It is also known as nephelite or nephelinite. The term "nepheline" comes from the Greek word "nephelis", meaning "cloud", as the mineral often has a cloudy or pearly appearance.
Nepers, also known as decibels (dB), is a logarithmic unit that measures the relative sound level of a sound. It was created by John Napier, a Scottish mathematician, and is commonly used to express the intensity of an acoustic signal or the gain of electronic amplifiers.
Nephalism is a noun that refers to an extreme rejection or avoidance of worldly or material things, often to the point of asceticism or mortification of the flesh. It can also describe a philosophical or religious view that emphasizes the renunciation of worldly desires and attachments in order to attain spiritual enlightenment or salvation. The term is derived from the Greek word "nephelē", meaning "cloud", and implies a state of being or a way of life that is elevated above the mundane and the physical.
Nephelauxetic refers to a property of certain optical materials that exhibit a negative change in refractive index when exposed to intense light, particularly in the ultraviolet or visible spectrum. This means that the material's refractive index decreases as the light intensity increases. This phenomenon is also known as "nephelauxetic effect" or "nephelauxetic change".
Nephelococcygia is a term that refers to the act of cloud-watching or indulging in idle or aimless daydreaming.
Nephelognosy refers to the study of clouds and the art of cloud classification and interpretation. It comes from the Greek words "nephelē", meaning cloud, and "gnosis", meaning knowledge or science. Nephelognosy is also sometimes referred to as cloudology.
Nepheloid refers to a layer of fine sediment or suspended particles in a fluid, such as water or air, that scatters light and gives the fluid a cloudy or hazy appearance.
A nephelometer is an instrument used to measure the concentration of suspended particles in a fluid, such as air or water.