| batrachian | (noun) any of various tailless stout-bodied amphibians with long hind limbs for leaping; semiaquatic and terrestrial species | Synonyms: anuran, frog, salientian, toad, toad frog |
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| chondrichthian | (noun) fishes in which the skeleton may be calcified but not ossified | Synonyms: cartilaginous fish |
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| ornithischian | (noun) herbivorous dinosaur with a pelvis like that of a bird | Synonyms: ornithischian dinosaur |
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| saurischian | (noun) herbivorous or carnivorous dinosaur having a three-pronged pelvis like that of a crocodile | Synonyms: saurischian dinosaur |
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| selachian | (noun) any of numerous fishes of the class Chondrichthyes characterized by a cartilaginous skeleton and placoid scales: sharks, rays, skates | Synonyms: elasmobranch |
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