Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun quaternion

1 sense of quaternion

Sense 1
four, 4, IV, tetrad, quatern, quaternion, quaternary, quaternity, quartet, quadruplet, foursome, Little Joe -- (the cardinal number that is the sum of three and one)
       => digit, figure -- (one of the elements that collectively form a system of numeration; "0 and 1 are digits")