Diapsid Definition

dī-ăpsĭd
noun
Any of a group of amniote vertebrates that are characterized by two openings in the temporal region on each side of the skull. The first diapsids emerged in the Pennsylvanian Period, and their descendants include the lizards, snakes, crocodiles, dinosaurs, pterosaurs, birds, and, in some classifications, the turtles.
American Heritage
Synonyms:
  • diapsid reptile
Antonyms:
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Other Word Forms of Diapsid

Noun

Singular:
diapsid
Plural:
diapsids

Origin of Diapsid

  • New Latin Diapsida taxon name di– Greek hapsis hapsid- arch (from the two temporal openings on each side of the skull) apsis

    From American Heritage Dictionary of the English Language, 5th Edition

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