sea urchin

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.

Origin of sea urchin

First recorded in 1585–95

Words nearby sea urchin

sea trout, Seattle, sea turtle, seatwork, seatworm, sea urchin, sea vegetable, Seaver, sea wall, sea walnut, seawan

Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Example sentences from the Web for sea urchin

Driesch has found that a tropism underlies the arrangement of the skeleton in the pluteus larvae of the sea-urchin.
Darwin and Modern Science|A.C. Seward and Others
On my way to the front of the peninsula, I looked for “sea-urchin,” but none fell in my way.
The Boy Tar|Mayne Reid
From the egg there hatches a tiny larva which does not at all resemble the parent starfish or sea-urchin.
Elementary Zoology, Second Edition|Vernon L. Kellogg
The sea-urchin can thus advance with ease, and even rapidity.
The Ocean World:|Louis Figuier

In the starfish we noted five ambulacral areas, one on the under side of each arm; similarly we find five in the sea-urchin.
Elementary Zoology, Second Edition|Vernon L. Kellogg

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 Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

单词	sea urchin
释义	sea urchin 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. Origin of sea urchin First recorded in 1585–95 Words nearby sea urchin sea trout, Seattle, sea turtle, seatwork, seatworm, sea urchin, sea vegetable, Seaver, sea wall, sea walnut, seawan Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020 Example sentences from the Web for sea urchin Driesch has found that a tropism underlies the arrangement of the skeleton in the pluteus larvae of the sea-urchin. Darwin and Modern Science\|A.C. Seward and Others On my way to the front of the peninsula, I looked for “sea-urchin,” but none fell in my way. The Boy Tar\|Mayne Reid From the egg there hatches a tiny larva which does not at all resemble the parent starfish or sea-urchin. Elementary Zoology, Second Edition\|Vernon L. Kellogg The sea-urchin can thus advance with ease, and even rapidity. The Ocean World:\|Louis Figuier In the starfish we noted five ambulacral areas, one on the under side of each arm; similarly we find five in the sea-urchin. Elementary Zoology, Second Edition\|Vernon L. Kellogg 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 Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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