Sea acorn

Also found in: Thesaurus, Medical, Encyclopedia, Wikipedia.

Sea´ a´corn

1.(Zool.) An acorn barnacle (Balanus).
Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
References in periodicals archive ?
Yoda purpurata -- to be exact -- is the name now given by a University of Aberdeen-led team of scientists to one of three new species of deep sea acorn worms or Enteropneusts discovered 2,500m or around 1.5 miles below the surface of the Atlantic Ocean.