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Definition of: pteropod
(ter′ə·pod) noun
One of a subclass or order (Pteropoda) of gastropods with the middle region of the foot expanded into winglike lobes or fins; a sea butterfly.
—adjective
1. Having the foot expanded into swimming lobes.
2. Of or pertaining to the Pteropoda: also pte·rop·o·dan (tə·rop′ə·dən). [<NL <Gk. pteron a wing + pous, podos a foot]
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