Gram-negative meaning

grămnĕgə-tĭv
Of, relating to, or being a bacterium that does not retain the violet stain used in the Gram stain method.
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Designating bacteria that do not retain the color stain.
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Of, relating to, or being a bacterium that does not retain the violet stain used in the Gram stain method.
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Relating to a group of bacteria that do not change color when subjected to the laboratory staining method known as Gram's method or Gram's stain. Gram-negative bacteria have relatively thin cell walls and are generally resistant to the effects of antibiotics or the actions of the body's immune cells. Gram-negative bacteria include E. coli and the bacteria that cause gonorrhea, typhoid fever, rickettsial fever, cholera, syphilis, plague, and Lyme disease.
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(medicine, of a bacterium) That is not stained violet by Gram's method.
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