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organ-pipe coral

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noun
  1. an alcyonarian coral of the genus Tubipora, occurring in tropical waters, and forming a complex colony of brick-red, vertical tubules joined at intervals by transverse plates.
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Origin of organ-pipe coral

First recorded in 1825–35
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018