Gram-positive meaning

grămpŏzĭ-tĭv
Of, relating to, or being a bacterium that retains the violet stain used in the Gram stain method.
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Designating bacteria that retain the color stain.
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Of, relating to, or being a bacterium that retains the violet stain used in the Gram stain method.
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Relating to a group of bacteria that turn a dark-blue color when subjected to a laboratory staining method known as Gram's method. Gram-positive bacteria have relatively thick cell walls and are generally sensitive to the destructive effects of antibiotics or the actions of the body's immune cells. Gram-positive bacteria include beneficial nitrogen-fixing bacteria in soil, as well as the bacteria that cause anthrax, botulism, leprosy, tuberculosis, scarlet fever, and strep throat.
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(medicine, bacteriology, of a bacterium) That is stained violet by Gram's method.
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Origin of gram-positive

  • From Gram (“a surname") + positive, after Danish bacteriologist Hans Christian Gram, who invented the Gram staining method.

    From Wiktionary