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2 definitions found

From: DICT.TW English-Chinese Dictionary 英漢字典

 Rugosa
 皺珊瑚目

From: Webster's Revised Unabridged Dictionary (1913)

 Ru·go·sa n. pl.  Paleon. An extinct tribe of fossil corals, including numerous species, many of them of large size.  They are characteristic of the Paleozoic formations. The radiating septs, when present, are usually in multiples of four.  See Cyathophylloid.
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