n. 1 each of four children born at one birth. 2 a set of four things working together. 3 Mus. a group of four notes to be performed in the time of three.
[ QUADRUPLE, after triplet ]
QUADRUPLET
Meaning of QUADRUPLET in English
Concise Oxford English dictionary. Краткий оксфордский словарь английского языка. 2012