English
quaternionic
From quaternion + -ic.
Formed from quaternion + -ic
Proto-Indo-European *kʷetwóres ‘four’
Late Latin quater ‘four times’
Late Latin quaternī ‘four each’
Late Latin quaterniō ‘the number four’
Middle English quaterniǒun ‘an ancient Roman leader of a squad of four…’
English quaternion
Today it means
adj Of or pertaining to a quaternion
Language periods are conventional ranges, not dates for this word.
Etymograph / quaternionic