{ ‖
As-teˊri-oid′e-a
, ‖Asˊter-id′e-a
, }
[NL., fr. Gr.
ἀστερίασ
+
-oid
. See
Asterias
.]
(Zool.)
A class of Echinodermata including the true starfishes. The rays vary in number and always have ambulacral grooves below. The body is star-shaped or pentagonal.