(n.) That part of an instrument or machine which serves as the means of operating it; as, a telegraph key; the keys of a pianoforte, or of a typewriter.
KEY
Meaning of KEY in English
Webster's English dictionary. Английский словарь Webster. 2012
(n.) That part of an instrument or machine which serves as the means of operating it; as, a telegraph key; the keys of a pianoforte, or of a typewriter.
Webster's English dictionary. Английский словарь Webster. 2012