gram-negative(redirected from Gram-negative bacterium)
Also found in: Dictionary, Thesaurus, Medical.
Related to Gram-negative bacterium: Gram positive bacterium
Of bacteria, decolorizing and staining with the counterstain when treated with Gram's stain.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.