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2 definitions found

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

 bivium
 二道體區

From: Webster's Revised Unabridged Dictionary (1913)

 Biv·i·um n.  Zool. One side of an echinoderm, including a pair of ambulacra, in distinction from the opposite side (trivium), which includes three ambulacra.
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