Sea acorn

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Sea´ a´corn

1.(Zool.) An acorn barnacle (Balanus).
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.