'Petalosticha' definitions:

Definition of 'Petalosticha'

From: GCIDE

Petalosticha \Pet`a*los"ti*cha\, PROP. n. pl. [NL., from Gr. pe`talon a leaf + sti`chos a row.] (Zool.) An order of Echini, including the irregular sea urchins, as the spatangoids. See Spatangoid. [1913 Webster]