| gram molecule |
the molecular weight of a substance expressed in grams; the basic unit of amount of substance adopted under the Systeme International d'Unites
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| Gram stain |
Gram's method: 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
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| gram-negative |
(of bacteria) being of or relating to a bacterium that does not retain the violet stain used in Gram's method
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| gram-positive |
(of bacteria) being or relating to a bacterium that retains the violet stain used in Gram's method
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| gramicidin |
an antibiotic produced by a soil bacterium; used chiefly as an antiseptic in treating local infections produced by Gram-positive bacteria
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