noun \ˈbär-ni-kəl\

: a kind of small shellfish that attaches itself to rocks and the bottoms of boats underwater

Full Definition of BARNACLE

[from a popular belief that the goose grew from the crustacean] :  any of numerous marine crustaceans (subclass Cirripedia) with feathery appendages for gathering food that are free-swimming as larvae but permanently fixed (as to rocks, boat hulls, or whales) as adults
bar·na·cled \-kəld\ adjective

Illustration of BARNACLE

Origin of BARNACLE

Middle English barnakille, alteration of bernake, bernekke
First Known Use: 15th century

Other Invertebrates (Except Insects) Terms

anemone, cephalopod, quahog


noun    (Concise Encyclopedia)

Barnacle—Anthony Mercieca/Root Resources

Any of a majority of the 1,000 species of the subclass Cirripedia of marine crustaceans that, as adults, are covered with a shell made of hard calcium-containing plates and are permanently cemented, head down, to rocks, pilings, ships' hulls, driftwood, or seaweed or to the bodies of larger sea creatures, from clams to whales. Barnacles trap tiny particles of food with their cirri, feathery retractable organs that emerge from openings between the shell plates. Adult barnacles commonly are hermaphrodites.


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