单词 | Crinoidea |
释义 | Crinoideaplural noun Cri·noi·dea krə̇ˈnȯidēə, -rīˈ- : a large class of chiefly tropical or fossil echinoderms that have a more or less cup-shaped body provided with five or more feathery arms commonly bifurcated or many-branched and bearing pinnules, a mouth lying between the arms on the concave upper surface, and opposite the mouth usually a long jointed stalk fixed to the base of the body and having its opposite end divided into rhizoid processes that anchor the animal to the sea bottom compare comatulid, sea lily crinoidean krə̇ˈnȯidēən (ˈ)krī¦- |
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