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4 definitions found

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

 sub·stra·tum /ˈsʌbˌstretəm, ˌstræ, ˌsʌbˈ/
 下層;地基;根基

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

 sub·stra·tum /ˈsəbˌstretəm, ˌstræt, ˈsəbˈ/ 名詞
 培養基,基質

From: Webster's Revised Unabridged Dictionary (1913)

 Sub·stra·tum n.; pl. Substrata
 1. That which is laid or spread under; that which underlies something, as a layer of earth lying under another; specifically Agric., the subsoil.
 2. Metaph. The permanent subject of qualities or cause of phenomena; substance.
 

From: WordNet (r) 2.0

 substratum
      n : any stratum lying underneath another [syn: substrate]
      [also: substrasta (pl)]