echinoid


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e·chi·noid

 (ĭ-kī′noid′)
n.
An echinoderm of the class Echinoidea, which includes the sand dollars and sea urchins.

echinoid

(ɪˈkaɪnɔɪd; ˈɛkə-)
n
(Animals) any of the echinoderms constituting the class Echinoidea, typically having a rigid ovoid body. The class includes the sea urchins and sand dollars
adj
(Animals) of or belonging to this class

e•chi•noid

(ɪˈkaɪ nɔɪd, ˈɛk əˌnɔɪd)

n.
1. any echinoderm of the class Echinoidea, comprising sea urchins and sand dollars, characterized by a rounded, armless body and a rigid endoskeleton with movable spines.
adj.
2. of, belonging to, or resembling the echinoids.
[1850–55; < New Latin Echinoidea; see echinus, -oidea]
References in periodicals archive ?
An echinoid fossil in the wall of <BBurberry's on Bond Street
The ecology of fertilization of echinoid eggs: the consequence of sperm dilution, adult aggregation, and synchronous spawning.
Effect of feeding on cadmium bioaccumulation in the echinoid Paracentrotus lividus (Echinodermata).
2E-G), including dendritic, echinoid, plumose, and perforated cupola organs (PCOs).
Bioclasts are composed of benthic foraminifera, various-sized bivalve fragments, radiolaria, echinoid fragments, bryozoa and pelagic fossils.
purpuratus in California, and increasingly frequently among other echinoid species, during the last several decades (Ward and Lafferty, 2004).
The marine molluscs, with a note on an echinoid fossil and the terrestrial snails, in B.
The occurrence of the sand dollar echinoid Periarchus lyelli in the Upper Eocene Caddell Formation of Texas is confirmed.
The ecology of fertilization of echinoid eggs: the consequences of sperm dilution, adult aggregation, and synchronous spawning.
Magnesium distribution in living and fossil specimens of the echinoid Perunella lasueuri Agassiz, Shark bay, Western Australia.
Recently discovered elements include ophioroid fragments and echinoid spines.
Biosynthesis of estrogen derivatives in the echinoid Lytechinus variogatus Lamarck.