資料來源 : Webster's Revised Unabridged Dictionary (1913)

Petalosticha \Pet`a*los"ti*cha\, n. pl. [NL., from Gr. ? a leaf
   + ? a row.] (Zo["o]l.)
   An order of Echini, including the irregular sea urchins, as
   the spatangoids. See {Spatangoid}.