tubipora

from The Century Dictionary.

• noun The leading genus of Tubiporidæ, or organ-pipe corals. T. musica is the best-known species. See cut in next column.

from the GNU version of the Collaborative International Dictionary of English.

• noun (Zoöl.) A genus of halcyonoids in which the skeleton, or coral (called organ-pipe coral), consists of a mass of parallel cylindrical tubes united at intervals by transverse plates. These corals are usually red or purple and form large masses. They are natives of the tropical parts of the Indian and Pacific Oceans.