pulmonate Syllabification: (pul·mo·nate)Pronunciation: /ˈpo͝olməˌnāt, ˈpəl-/ ZoologyDefinition of pulmonate noun a mollusk of the group Pulmonata, which includes the land snails and slugs and many freshwater snails. adjective relating to or denoting pulmonates. pulmonate in other Oxford dictionaries Definition of pulmonate in the British & World English dictionary