pteropodan
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pteropod — n. small swimming mollusc, often shell less. ♦ pteropodan, a … Dictionary of difficult words
pteropod — [ter′ə päd΄] adj. [< ModL Pteropoda: see PTERO & POD] of or relating to certain orders of small, thin shelled or shell less gastropod mollusks that swim by means of winglike lobes on the foot n. any such animal pteropodan [tə räp′ə dən] adj.,… … English World dictionary