a gastropod mollusk of various families, mostly marine, with a single, low, cone-shaped shell and a thick, fleshy foot, by means of which it clings to rocks, timbers, etc.
See limpet in American Heritage Dictionary 4
(lĭmˈpĭt)
noun
Any of numerous marine gastropod mollusks, as of the families Acmaeidae and Patellidae, characteristically having a conical shell and adhering to rocks of tidal areas.
One that clings persistently.
A type of explosive designed to cling to the hull of a ship and detonate on contact or signal.