|1.||(modifier) of, denoting, or containing the monovalent group of atoms RCO-, where R is an organic group: acyl group or radical; acyl substitution|
|2.||an organometallic compound in which a metal atom is directly bound to an acyl group|
|[C20: from |
|a fool or simpleton; ninny.|
|a screen or mat covered with a dark material for shielding a camera lens from excess light or glare.|
acyl ac·yl (ās'əl)
A organic radical having the general formula RCO, derived from the removal of a hydroxyl group from an organic acid.
|acyl (ās'əl) Pronunciation Key
An organic compound containing the group RCO, where R is a halogen. Acyls are formed from organic acids by replacing the hydroxyl group (OH) within the carboxyl group (COOH) with a halogen. For example, acetyl chloride (CH3COCl) is formed by replacing the hydroxyl group of acetic acid (CH3COOH) with a chlorine atom. The names of acyls are formed by replacing the suffix -ic of the acid's name with -yl.