pulmonata

Pulmonata

Pul`mo*na"ta\, n. pl. [NL., from L. pulmo, -onis, a lung.] (Zo["o]l.) An extensive division, or sub-class, of hermaphrodite gastropods, in which the mantle cavity is modified into an air-breathing organ, as in Helix, or land snails, Limax, or garden slugs, and many pond snails, as Limn[ae]a and Planorbis.
Webster's Revised Unabridged Dictionary, © 1996, 1998 MICRA, Inc.
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WordNet
pulmonata

noun
large order of gastropods usually breathing by means of a lung-like sac comprising most land snails and slugs and many freshwater snails 
WordNet® 3.0, © 2006 by Princeton University.
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