Gram Stain — synonyms, definition

1. Gram stain (Noun)

Gram method Gram's method Gram's procedure Gram's stain

Gram stain (Noun) — A staining technique used to classify bacteria; bacteria are stained with gentian violet and then treated with Gram's solution; after being decolourized 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.

staining