gram stain Meaning, Definition & Usage

  1. noun a staining technique used to classify bacteria; bacteria are stained with gentian violet and then treated with Gram's solution; after being decolorized with alcohol and treated with safranine and washed in water, those that retain the gentian violet are Gram-positive and those that do not retain it are Gram-negative
    Gram method; Gram's method; Gram's procedure; Gram's stain.

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