I. WORDS EXPRESSING ABSTRACT RELATIONS
V. NUMBER
2. DETERMINATE NUMBER
Quaternity.
[Nouns] quaternity, four, tetrad, quartet, quaternion, square, quarter; tetract, tetragon.
quadrangle, quadrature, quadfifoil, quadfiform, quadruplet; quatrefoil.
[Verbs] reduce to a square, square.
[Adjectives] four; quaternary, quaternal; quadratic; quartile; tetract, tetractic, tetractinal; tetrad, tetragonal.
