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Glabrousness
Glabrousness (from the Latin ''glaber'' meaning "bald", "hairless", "shaved", "smooth") is the technical term for an anatomically atypical lack of hair, down or other such covering. This may be natural or due to loss because of a physical condition, such as alopecia universalis, which causes hair to fall out or prevents its growth.
==In botany==
In botany and mycology, a ''glabrous'' morphological feature is smooth, glossy, having no trichomes (bristles or hair-like structures), or glaucousness (see also indumentum). No plants have hair, although some structures may resemble it. Glabrous features may be an important means of identifying flora species. Glabrous characteristics of leaves, stems, and fruit are commonly used in plant keys.
The term is only used for features that lack trichomes at all times. When an organ has trichomes that are lost with age, the term used is ''glabrescent''.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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