"divisible into exactly similar halves by more than one plane," by 1875; see poly- "many" + symmetrical. Related: Polysymmetry; polysymmetrically.
Entries linking to polysymmetrical
poly-
word-forming element meaning "many, much, multi-, one or more," from Greek polys "much" (plural polloi), from PIE root *pele- (1) "to fill," with derivatives referring to multitudinousness or abundance. Equivalent to Latin multi-, it is properly used in compounds only with words of Greek origin. In chemical names, usually indicating a compound with a large number of atoms or molecules of the same kind (such as polymer).
symmetrical adj.
1751, from symmetry + -ical. Related: Symmetrically (1570s).