pulmonate

from The American Heritage® Dictionary of the English Language, 5th Edition.

• adjective Having lungs or lunglike organs.
• adjective Of or belonging to a large group of gastropods having a cavity in the mantle that is used as a lung for breathing air and including the terrestrial snails and slugs, certain freshwater snails, and some marine species.
• noun A pulmonate gastropod.

from The Century Dictionary.

• Having lungs, lung-sacs, or lung-like organs; pulmonary or pulmoniferous, as a mollusk or an arachnidan; pulmonated, as a vertebrate: distinguished from branchiate and tracheate.
• noun A member of the Pulmonata in either sense, as a snail or a spider.

from the GNU version of the Collaborative International Dictionary of English.

• adjective Having breathing organs that act as lungs.
• adjective Pertaining to the Pulmonata.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• adjective anatomy having lungs or similar organs
• adjective biology of, relating to, or belonging to the gastropod order Pulmonata (slugs and snails)
• noun A gastropod of the order Pulmonata