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echinoid

American

[ih-kahy-noid, ek-uh-noid] / ɪˈkaɪ nɔɪd, ˈɛk əˌnɔɪd /

adjective

belonging or pertaining to the class Echinoidea, comprising mainly sea urchins and sand dollars.

noun

any echinoderm of the Echinoidea.

echinoid British

/ 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

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

adjective

of or belonging to this class

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of echinoid

1850–55; < New Latin Echinoidea; echinus, -oidea

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

An Upper Silurian echinoid, however, Palaeodiscus, is believed by W.J.

From Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 10 "Echinoderma" to "Edward" by Various

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023