Ech. (Echinodermata)

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Echinoidea — Ech·i·noi·dea .ek ə nȯi dē ə n pl a class of motile bottom dwelling echinoderms comprising the sea urchins and related forms ech·i·noid ek ə .nȯid n * * * Echi·noi·dea (e kĭ noiґde ə) a class of the phylum Echinodermata, including the … Medical dictionary
Echinidea — Echinoidea Ech i*noi de*a, n. pl. [NL. See {Echinus}, and { oid}.] (Zo[ o]l.) The class Echinodermata which includes the sea urchins. They have a calcareous shell, usually more or less spheroidal or disk shaped, composed of many united plates,… … The Collaborative International Dictionary of English
Echinoida — Echinoidea Ech i*noi de*a, n. pl. [NL. See {Echinus}, and { oid}.] (Zo[ o]l.) The class Echinodermata which includes the sea urchins. They have a calcareous shell, usually more or less spheroidal or disk shaped, composed of many united plates,… … The Collaborative International Dictionary of English
Echinoidea — Ech i*noi de*a, n. pl. [NL. See {Echinus}, and { oid}.] (Zo[ o]l.) The class Echinodermata which includes the sea urchins. They have a calcareous shell, usually more or less spheroidal or disk shaped, composed of many united plates, and covered… … The Collaborative International Dictionary of English

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