'Polyacra' definitions:

Definition of 'Polyacra'

From: GCIDE

Polyacron \Pol`y*a"cron\, n.; pl. Polyacra, E. Polyacrons. [NL., fr. Gr. poly`s many + 'a`kron summit.] (Geom.) A solid having many summits or angular points; a polyhedron. [1913 Webster]