Dictionary entry

Clypeastroid

Webster's Dictionary 1913

Clyp′e‐as″troid (?), a. [NL. Clypeaster (L. clupeus shield + aster star) + -oid.] (Zoöl.) Like or related to the genus Clupeaster; — applied to a group of flattened sea urchins, with a rosette of pores on the upper side.