SEA URCHIN • DICTIONARY ONE.COM • Definition of Sea urchin

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noun

Sea urchin n. (Zool.) Any one of numerous species of echinoderms of the order Echinoidea. Note: When living they are covered with movable spines which are often long and sharp.

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Etymology of 'Sea urchin'

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Collaborative International Dictionary of English 0.48

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"Sea urchin" Quotes from Famous Books

... Bot. Mag. 4326.—This is another of the Mamillaria-like kinds, and is remarkable for the depressed form of its stem, which may be likened to a sea urchin, both in size and shape. Old plants are from 6 in. to 8 in. in diameter, and about 4 in. high; the spiral formed by the tubercles rises very gradually, and each of the latter is surmounted by a tuft of strong, brown, radiating spines, imbedded in a little cushion of wool. The flowers spring from ...

— Cactus Culture For Amateurs • W. Watson

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Words linked to "Sea urchin" : Echinus esculentus, edible sea urchin, sand dollar, class Echinoidea, Echinoidea, echinoderm, heart urchin