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4 definitions found

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

 di·a·tom /ˈdaɪəˌtɑm/
 矽藻類

From: DICT.TW English-Chinese Medical Dictionary 英漢醫學字典

 di·a·tom /ˈdaɪəˌtɑm/ 名詞

From: Webster's Revised Unabridged Dictionary (1913)

 Di·a·tom n.
 1. Bot. One of the Diatomaceæ, a family of minute unicellular Algæ having a siliceous covering of great delicacy, each individual multiplying by spontaneous division. By some authors diatoms are called Bacillariæ, but this word is not in general use.
 2. A particle or atom endowed with the vital principle.
    The individual is nothing. He is no more than the diatom, the bit of protoplasm.   --Mrs. E. Lynn Linton.
 

From: WordNet (r) 2.0

 diatom
      n : microscopic unicellular marine or freshwater colonial alga
          having cell walls impregnated with silica