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echinoid
[ ih-kahy-noid, ek-uh-noid ]
adjective
- belonging or pertaining to the class Echinoidea, comprising mainly sea urchins and sand dollars.
noun
- any echinoderm of the Echinoidea.
echinoid
/ ɪˈkaɪnɔɪd; ˈɛkə- /
noun
- any of the echinoderms constituting the class Echinoidea, typically having a rigid ovoid body. The class includes the sea urchins and sand dollars
adjective
- of or belonging to this class
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Word History and Origins
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Example Sentences
A pair of ciliated epaulettes on each side of and behind the ciliated ring is very characteristic of some Echinoid larv.
From Project Gutenberg
The rows of plates in an Echinoid which are not perforated for the emission of the "tube-feet."
From Project Gutenberg
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