barnacle

noun

bar·​na·​cle ˈbär-ni-kəl 

1

: barnacle goose

2

[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

barnacled

ˈbär-ni-kəld 

adjective

Illustration of barnacle

• 1 peduncle
• 2 cirri

Examples of barnacle in a Sentence

Recent Examples on the Web

The only character who seems entirely transparent is Frederik, who can’t hide his resentment of his second-class spousal status or his contempt for the sycophants and mediocrities who cling to his wife like barnacles. —Justin Chang, New Yorker, 3 Oct. 2025

Of course, barnacles are crustaceans, not molluscs, but Haldane — sensitive to tradition — granted his creatures oyster-like qualities, too. —Thomas Moynihan, Big Think, 20 Aug. 2025

Education Department This barnacle was started in 1979. —Walter E Block, Oc Register, 21 July 2025

Some creatures, like barnacles, can survive on a seawall. —Molly Duerig, Miami Herald, 28 June 2025

Word History

Etymology

Middle English barnakille, alteration of bernake, bernekke

First Known Use

15th century, in the meaning defined at sense 1

Phrases Containing barnacle

• barnacle goose

Kids Definition

barnacle

noun

bar·​na·​cle ˈbär-ni-kəl 

: any of numerous small saltwater crustaceans with feathery outgrowths for gathering food that are free-swimming as larvae but as adults are permanently fastened (as to rocks or the bottoms of ships)

barnacled

-kəld 

adjective