n.
Pronunciation: s ə - ' l ē -n ē - ə m
Function: noun
Etymology: New Latin, from Greek sel ē n ē moon, from selas brightness
Date: 1818
: a photosensitive element that occurs in both crystalline and amorphous forms, is obtained chiefly as a by-product in copper refining, and is used especially in glass, semiconductor devices, and alloys ― see ELEMENT table