Where does “triquadrantal” come from?
triquadrantal (English) comes from English quadrantal, from Latin quadrantalis, from Latin quadrans, from Latin quattŭor, from Portuguese quarto, from Old Portuguese quarto, from Latin quārtus, from Proto-Indo-European kʷeturtos — and.
triquadrantal (English): Having three quadrants
Ancestry of “triquadrantal”, step by step