transcription, транскрипция: [ kwə-ˈtər-nē-ən, kwä- ]
noun
Etymology: Middle English quaternyoun, from Late Latin quaternion-, quaternio, from Latin quaterni four each, from quater four times; akin to Latin quattuor four — more at four
Date: 14th century
1. : a set of four parts, things, or persons
2.
a. : a generalized complex number that is composed of a real number and a vector and that depends on one real and three imaginary units
b. plural : the calculus of quaternions