Acorn-barnacle Definition

noun
Any of various barnacles having a conical shell that is directly attached to rocks or other hard surfaces.
American Heritage
Any of a genus (Balanus) of stalkless barnacles that resemble acorns.
Webster's New World
Synonyms:
Balanus balanoidesrock barnacle

Other Word Forms of Acorn-barnacle

Noun

Singular:
acorn-barnacle
Plural:
acorn barnacles

Origin of Acorn-barnacle

  • From the resemblance of the barnacle in its shell to an acorn in its cupule

    From American Heritage Dictionary of the English Language, 5th Edition

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