Word Study
ophiurioidea
CIDE DICTIONARY
ophiurioidea, n. pl. [NL., fr. Gr. 'o`fis serpent + 'oyra` tail + e'i^dos form.].
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]
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