PYGIDIUM
Etymology
Noun
pygidium (plural pygidia or pygidiums)
(zoology) The caudal plate of trilobites, crustacea, and certain insects.
Source: Wiktionary
Py*gid"i*um, n.; pl. Pygidia. Etym: [NL., fr. Gr. (Zoöl.)
Definition: The caudal plate of trilobites, crustacean, and certain insects. See Illust. of Limulus and Trilobite.
Source: Webster’s Unabridged Dictionary 1913 Edition
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Word of the Day
25 November 2024
ONCHOCERCIASIS
(noun) infestation with slender threadlike roundworms (filaria) deposited under the skin by the bite of black fleas; when the eyes are involved it can result in blindness; common in Africa and tropical America
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