hypoplastron

H4Y4P3O1P3L1A1S1T1R1O1N1

noun

The third lateral plate in the plastron of turtles

Similar
hyposternum
Scrabble 22
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Meanings

nounhypoplastron (plural hypoplastrons or hypoplastra)

plural hypoplastrons · plural hypoplastra

  1. The third lateral plate in the plastron of turtles

    Synonyms: hyposternum

Synonyms & antonyms

nounThe third lateral plate in the plastron of turtles

Similar
hyposternum

Origin

Coined by Thomas Henry Huxley in 1872 as hypo- + plastron. Superseded the earlier hyposternum, a nominalised form of the French adjective hyposternal, coined by Étienne Geoffroy Saint-Hilaire in 1818. The prefix is from Ancient Greek ὑπό (hupó, “under”), in reference to its position in the posterior portion of the plastron.

Full word history & related roots →
Cite this entry
APA

hypoplastron. (n.d.). In WatkinsX Dictionary. Retrieved November 3, 2026, from https://dictionary.watkinsx.com/word/hypoplastron

MLA

“hypoplastron.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/hypoplastron. Accessed November 3, 2026.

Chicago

WatkinsX Dictionary, s.v. “hypoplastron,” accessed November 3, 2026, https://dictionary.watkinsx.com/word/hypoplastron.

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