Noun ichthyosauria has 1 sense
  1. Ichthyosauria, order Ichthyosauria - extinct marine reptiles: ichthyosaurs
    --1 is a kind of animal order
    --1 is a member of Archosauria, subclass Archosauria
    --1 has members: ichthyosaur; Ichthyosauridae, family Ichthyosauridae
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