About The Word Echinodermata
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Echinodermata
Echinodermata Definition And Meaning |
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What's The Definition Of Echinodermata?
[n] radially symmetrical marine invertebrates including e.g. starfish and sea urchins and sea cucumbers
Synonyms | Synonyms for Echinodermata: phylum Echinodermata Related Terms | Find terms related to Echinodermata: See Also | animal kingdom | Animalia | Asteroidea | class Asteroidea | class Crinoidea | class Echinoidea | class Holothuroidea | class Ophiuroidea | Crinoidea | echinoderm | Echinoidea | Holothuroidea | kingdom Animalia | Ophiuroidea | phylum Echinodermata In Webster's Dictionary \E*chi`no*der"ma*ta\
([-e]*k[imac]`n[-o]*d[~e]r"m[.a]*t[.a]), n. pl. [NL., fr. Gr.
'echi^nos hedgehog, sea urchin + de`rma, -atos, skin.]
(Zo["o]l.)
One of the grand divisions of the animal kingdom. By many
writers it was formerly included in the Radiata. [Written
also {Echinoderma}.]
Note: The species usually have an exterior calcareous
skeleton, or shell, made of many pieces, and often
covered with spines, to which the name. They may be
star-shaped, cylindrical, disk-shaped, or more or less
spherical. The body consists of several similar parts
(spheromeres) repeated symmetrically around a central
axis, at one end of which the mouth is situated. They
generally have suckers for locomotion. The group
includes the following classes: Crinoidea, Asterioidea,
Ophiuroidea, Echinoidea, and Holothurioidea. See these
words in the Vocabulary, and also {Ambulacrum}.
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