echinoid
/ih-kahy-noid, ek-uh-noid/US // ɪˈkaɪ nɔɪd, ˈɛk əˌnɔɪd //UK // (ɪˈkaɪnɔɪd, ˈɛkə-) //
回音壁,回纹针虫,回纹针虫类,回纹动物
Definitions
adj.形容词 adjective
- 1
- : belonging or pertaining to the class Echinoidea, comprising mainly sea urchins and sand dollars.
n.名词 noun
- 1
- : any echinoderm of the Echinoidea.
Examples
A pair of ciliated epaulettes on each side of and behind the ciliated ring is very characteristic of some Echinoid larv.
The rows of plates in an Echinoid which are not perforated for the emission of the "tube-feet."
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