Merriam-Webster Collegiate Dictionary - pulmonate

 I. adjective  Etymology: Latin pulmon-, pulmo lung  Date: circa 1859  1. having lungs or organs resembling lungs  2. of or relating to a subclass (Pulmonata) of gastropod mollusks having a respiratory sac and comprising most land snails and slugs and many freshwater snails  II. noun  Date: 1883 a ~ gastropod