Meaning of ALKYL in English

I. ˈal-kəl adjective

Date: 1879

: having a monovalent organic group and especially one C n H 2 n +1 (as methyl) derived from an alkane (as methane)

II. noun

Etymology: probably from German, from Alkohol alcohol

Date: 1889

: a compound of one or more alkyl groups with a metal

mercury alkyl s

Merriam-Webster's Collegiate English vocabulary.      Энциклопедический словарь английского языка Merriam Webster.