n. 1 the principal spring of a mechanical watch, clock, etc. 2 a chief motive power; an incentive.
MAINSPRING
Meaning of MAINSPRING in English
Concise Oxford English dictionary. Краткий оксфордский словарь английского языка. 2012
n. 1 the principal spring of a mechanical watch, clock, etc. 2 a chief motive power; an incentive.
Concise Oxford English dictionary. Краткий оксфордский словарь английского языка. 2012