Ophiurioidea \O`phi*u`ri*oi"de*a\, Ophiuroidea
\O`phi*u*roi"de*a\, n. pl. [NL., fr. Gr. 'o`fis serpent + 'oyra`
tail + e'i^dos form.] (Zool.)
A class of star-shaped echinoderms having a disklike body,
with slender, articulated arms, which are not grooved beneath
and are often very fragile; -- called also {Ophiuroida} and
{Ophiuridea}. See Illust. under {Brittle star}.
[1913 Webster]