Skip to definition.
Get the FREE one-click dictionary software for Windows or the iPhone/iPad and Android apps

Adjective: Gram-negative  'gram'ne-gu-tiv
  1. (of bacteria) being of or relating to a bacterium that does not retain the violet stain used in Gram's method
    "Other gram-negative rods can be very small"

See also: disconfirming, negative

Encyclopedia: Gram-negative