Word.ws English Dictionary

hyoplastron

hyoplastron noun: the second lateral plate in the plastron of turtles.

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

Noun

hyoplastron (plural hyoplastrons or hyoplastra)

  1. The second lateral plate in the plastron of turtles.
    Synonyms:
    hyosternum

Synonyms of hyoplastron

Forms of hyoplastron

pluralhyoplastrons
pluralhyoplastra

Origin of hyoplastron

Coined by Thomas Henry Huxley in 1872 as hyo- + plastron. Superseded the earlier hyosternum, a nominalised form of the French adjective hyosternal, coined by Étienne Geoffroy Saint-Hilaire in 1818. The prefix is from Ancient Greek ῡ̔οειδής (hūoeidḗs, “shaped like the letter Υ”), ultimately from ὗ (hû, “the Greek letter upsilon”), reflecting its original description as the sternal attachment of the sternohyoid muscle (whose other attachment is on the hyoid bone).

Questions about hyoplastron

What does hyoplastron mean?
Hyoplastron means the second lateral plate in the plastron of turtles.
What part of speech is hyoplastron?
Hyoplastron is a noun.
What is the plural of hyoplastron?
The plural of hyoplastron is hyoplastrons.

Words near hyoplastron in the dictionary

  1. hyongum
  2. hyopalatine
  3. hyoperfusion
  4. hyoplastra
  5. hyoplastral
  6. hyoplastron
  7. hyoplastrons
  8. hyopsodontid
  9. hyopsodontids
  10. hyosciamine
  11. hyoscine

Source and license

Adapted from Wiktionary: hyoplastron (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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