Definition of "gastropod" [gas•tro•pod]

• Any of various mollusks of the class Gastropoda, such as the snail, slug, cowrie, or limpet, characteristically having a single, usually coiled shell or no shell at all, a ventral muscular foot for locomotion, and eyes and feelers located on a distinct head. (noun)
• Of or belonging to the class Gastropoda. (adjective)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "The substrata with which a terrestrial gastropod is in contact must be sufficiently wet, the air humidity adequately high, and perhaps its food of a high enough water content so that the animal’s daily activity does not result in a negative water balance."
• "The surface a gastropod is on must be sufficiently wet, the air humidity adequately high, and its food of a high enough water content so that daily activity doesn’t result in a negative water balance. (8 words shorter.)"
• "4. The names of both groups end with the suffix pod; a gastropod is a "stomach-foot", while an isopod is an "equal-foot"."