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sea urchin
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noun
any echinoderm of the class Echinoidea, having a somewhat globular or discoid form, and a shell composed of many calcareous plates covered with projecting spines.
a tall evergreen shrub or small tree, Hakea laurina, of Australia, having narrow leaves and dense, globe-shaped clusters of crimson flowers with long yellow stamens.
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Origin of sea urchin
First recorded in 1585–95
Words nearby sea urchin
sea trials, sea trout, Seattle, sea turtle, seatwork, sea urchin, sea vegetable, Seaver, sea wall, sea walnut, seawan
Dictionary.com Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
How to use sea urchin in a sentence
British Dictionary definitions for sea urchin
sea urchin
noun
any echinoderm of the class Echinoidea, such as Echinus esculentus (edible sea urchin), typically having a globular body enclosed in a rigid spiny test and occurring in shallow marine waters
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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