Rock-barnacle



noun
1.
See under barnacle1 (def 1).
noun
1.
any marine crustacean of the subclass Cirripedia, usually having a calcareous shell, being either stalked (goose barnacle) and attaching itself to ship bottoms and floating timber, or stalkless (rock barnacle or acorn barnacle) and attaching itself to rocks, especially in the intertidal zone.
2.
a person or thing that clings tenaciously.
noun
1.
any of various marine crustaceans of the subclass Cirripedia that, as adults, live attached to rocks, ship bottoms, etc. They have feathery food-catching cirri protruding from a hard shell See acorn barnacle, goose barnacle
2.
a person or thing that is difficult to get rid of
barnacle
(bär’nə-kəl)
Any of various small marine crustaceans of the subclass Cirripedia that form a hard shell in the adult stage and attach themselves to underwater surfaces, such as rocks, the bottoms of ships, and the skin of whales.

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