gram-negative

gram-negative definition - medical

gram-negative or Gram-negative

adjective
Of, relating to, or being a bacterium that does not retain the violet stain used in Gram's method.

The American Heritage® Medical Dictionary Copyright © 2009 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

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