echinoid

e·chi·noid
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/ˈɛk.əˌnɔɪd//əˈkaɪˌnɔɪd//iˈkaɪˌnɔɪd/

noun

Any sea urchin or sea dollar of the class Echinoidea.

Scrabble 14
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Meanings

nounechinoid (plural echinoids)

plural echinoids

  1. biologyAny sea urchin or sea dollar of the class Echinoidea.
adjective
  1. Resembling a sea urchin.

Origin

From echino- + -oid.

Full word history & related roots →
Cite this entry
APA

echinoid. (n.d.). In WatkinsX Dictionary. Retrieved November 2, 2026, from https://dictionary.watkinsx.com/word/echinoid

MLA

“echinoid.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/echinoid. Accessed November 2, 2026.

Chicago

WatkinsX Dictionary, s.v. “echinoid,” accessed November 2, 2026, https://dictionary.watkinsx.com/word/echinoid.

Source: echinoid on Wiktionary, CC BY-SA 4.0.