a. Ornith. [f. mod.L. Tropidosternī pl. (f. Gr. τρόπις, -ιδ- keel + στέρνον, L. sternum breast-bone) + -AL.] Belonging to the division Tropidosterni (= Carinatæ) of birds; having a keeled breast-bone.

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In recent Dicts.

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