sea urchin

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Related to Arbacia: Crangon

sea urchin

n.
Any of various echinoderms of the class Echinoidea, having a soft body enclosed in a rounded, radially symmetrical, calcareous skeleton covered with long spines.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

sea urchin

n
(Animals) 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 and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

sea′ ur`chin


n.
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.
[1585–95]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.

sea urchin

Any of various invertebrate sea animals having a round body covered by a shell with movable spines. Sea urchins are related to starfish.
The American Heritage® Student Science Dictionary, Second Edition. Copyright © 2014 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.sea urchin - shallow-water echinoderms having soft bodies enclosed in thin spiny globular shellssea urchin - shallow-water echinoderms having soft bodies enclosed in thin spiny globular shells
echinoderm - marine invertebrates with tube feet and five-part radially symmetrical bodies
class Echinoidea, Echinoidea - sea urchins and sand dollars
Echinus esculentus, edible sea urchin - a sea urchin that can be eaten
sand dollar - flattened disklike sea urchins that live on sandy bottoms
heart urchin - sea urchin having a heart-shaped body in a rigid spiny shell
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
Translations
merisiili
hérisson de mer
קיפוד ים
tengeri sün
ígulker
zee-egel

sea urchin

nriccio di mare
Collins Italian Dictionary 1st Edition © HarperCollins Publishers 1995

sea urchin

n erizo de mar
English-Spanish/Spanish-English Medical Dictionary Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved.
References in periodicals archive ?
Of the seven northern range expansions, three were crabs (Achelous xantusii and Malacoplax californiensis, and Uca princeps), two mollusks (Aplysia vaccaria and Lobatus galeatus), one urchin (Arbacia stellata), and one fish (Alphestes immaculatus).
In the subtropics, adult Arbacia stellata studied in Baja California, Mexico, had an estimated WT of 14.5-16.4 [degrees]C but a much smaller TSM of 3-4.3 [degrees]C (Diaz et al., 2017).
(2011) tested embryo-larval development (ELD) of sea urchin and its fertilization by a bioassays attempt to find out an optimum range of salinity (15 to 40.5 psu) with two species of Atlantic sea urchin: Arbacia lixula and Paracentrotus lividus.
ABSTRACT Populations of the black sea urchin Arbacia stellata present in the Gulf of California and outer Pacific Coast area are probably the result of colonization from the Panamic region.
Thus, [delta][sup.15] in T ventricosus was similar with the isotopic signal of the omnivorous sea urchins Centrostephanus tenuispinus, Phyllacanthus irregularis, Strongylocentrotus pallidus and Arbacia lixula (Vanderklift et al., 2006; Wangensteen et al., 2011).
Genetic variation within and between geographically separated populations of the seaurchin, Arbacia punctulata.
Asi mismo estos valores son similares a los obtenidos para otras especies de equinodermos (Arbacia lixula Hd= 0.912, [pi]= 0.0075, Wangensteen 2013) y otros invertebrados (Nerita albicilla Hd= 0.989, [pi]= 0.021, Crandall et al.
Normal Embryogenesis in Arbacia, Katie Hopkins, Susan Roy, Department of Biology, Presbyterian College