pro·rhip·i·do·glos·so·mor·pha \prōˌripədōˌgläsəˈmȯrfə\noun plural Usage: capitalized Etymology: New Latin, from pro- (I) + Rhipidoglossa + -o- + -morpha in some classifications: a primary division of Mollusca including the classes Gastropoda, Scaphopoda, and Lamellibranchia