Opisthocoela
plural noun
Opis·tho·coe·la
: a suborder of Salientia comprising frogs and toads having short free ribs and vertebrae that are concave behind but not in front and including the families Discoglossidae and Pipidae
opisthocoelan
noun
-lən
plural -s
opisthocoelid
adjective or noun
⸗¦⸗⸗¦⸗lə̇d
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Merriam-Webster unabridged
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