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2 definitions found

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

 trigonia
 三角蛤屬

From: Webster's Revised Unabridged Dictionary (1913)

 Tri·go·ni·a n.  Zool. A genus of pearly bivalve shells, numerous extinct species of which are characteristic of the Mesozoic rocks. A few living species exist on the coast of Australia.