quaternion (kwaternion)

t. [ The Angels themselves... are distinguisht and qua terniond into their cel est i all Prince domes. Milton , Church-Government, i. 1. quaternionist (kwa-tėr'ni-on-ist), n. [ qua ternion + -ist . ] A student of quaternions. Do we depart wider from the primary traditions of arithmetic than the Quaternionist does? J. Venn , Symbolic Logic, р. 91.