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

That also means that everything else in the water is growing faster, too – like barnacles and bacteria. —Ashley Miznazi, Miami Herald, 10 Oct. 2025

The piece is described as a funicular structure designed to resemble a shell covered with barnacles. —Jennifer Van Grove, San Diego Union-Tribune, 9 Oct. 2025

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

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