Noun
A group of eight things, particularly
Coordinate terms: singlet, couplet, triplet, quadruplet, tetraplet, pentuplet, sextuplet, septuplet, nonuplet, decuplet, centuplet, multiplet
An eight-part multiplet.
A group of eight children born together.
(music) A group of eight notes played in the time of six.
Source: en.wiktionary.org