limpet
lim.pet \'lim-p*t\ n [ME lempet, fr. OE lempedu, fr. ML lampreda] 1: a marine gastropod mollusk with a low conical shell broadly open beneath that browses over rocks or timbers in the littoral area and adheres very tightly when disturbed 2: a person who clings tenaciously to someone or something 3: an explosive designed to cling to the hull of a ship