||Nem`a*to*ca"lyx (?), n.; pl. Nematocalyces (#), E. -calyxes (#). [NL. See Nemato-, and Calyx.] (Zoöl.) One of a peculiar kind of cups, or calicles, found upon hydroids of the family Plumularidæ. They contain nematocysts. See Plumularia.