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1. Oxford Dictionary

   Gram stain

   • IPA[ɡram]

   英式

   • n.
     a staining technique for the preliminary identification of bacteria, in which a violet dye is applied, followed by a decolorizing agent and then a red dye. The cell walls of certain bacteria (denoted Gram-positive) retain the first dye and appear violet, while those that lose it (denoted Gram-negative) appear red.

   • noun: Gram stain

2. • 更多解釋

   Gram stain

   • IPA[ˈɡram ˌstān]

   • n.
     a staining technique for the preliminary identification of bacteria, in which a violet dye is ...

   Oxford American Dictionary