Word.ws English Dictionary

hypoplastron

hypoplastron noun: the third lateral plate in the plastron of turtles.

hypoplastron: the third lateral plate in the plastron of turtles
Image: Faendalimas, CC BY-SA 3.0, via Wikimedia Commons

Noun

hypoplastron (plural hypoplastrons or hypoplastra)

  1. The third lateral plate in the plastron of turtles
    Synonyms:
    hyposternum

Synonyms of hypoplastron

Forms of hypoplastron

pluralhypoplastrons
pluralhypoplastra

Origin of hypoplastron

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 Superseded the earlier hyposternum, a nominalised form of the French adjective hyposternal, coined by Étienne Geoffroy Saint-Hilaire in 1818.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.

Questions about hypoplastron

What does hypoplastron mean?
Hypoplastron means the third lateral plate in the plastron of turtles.
What part of speech is hypoplastron?
Hypoplastron is a noun.
What is the plural of hypoplastron?
The plural of hypoplastron is hypoplastrons.

Words near hypoplastron in the dictionary

  1. hypoplastic
  2. hypoplasticity
  3. hypoplasties
  4. hypoplastra
  5. hypoplastral
  6. hypoplastron
  7. hypoplastrons
  8. hypoplasty
  9. hypopleura
  10. hypopleural
  11. hypopleurite

Source and license

Adapted from Wiktionary: hypoplastron (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.

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Cite this entry: “hypoplastron.” Word.ws, https://word.ws/hypoplastron. Based on Wiktionary, CC BY-SA 4.0.