n. the tip of a finger. have at one's fingertips be thoroughly familiar with (a subject etc.).
FINGERTIP
Meaning of FINGERTIP in English
Concise Oxford English dictionary. Краткий оксфордский словарь английского языка. 2012
n. the tip of a finger. have at one's fingertips be thoroughly familiar with (a subject etc.).
Concise Oxford English dictionary. Краткий оксфордский словарь английского языка. 2012