Of, relating to, or being a bacterium that does not retain the violet stain used in Gram's method.(adjective)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "gram-negative" in a sentence
"There was evidence that exposure to a particular type of bacteria, known as gram-negative rods, was also related to lower rates of allergic responses."
"Also known as gram-negative bacteremia and gram-positive bacteremia, sepsis occurs when infectious agents like bacteria or fungi or products of infection like bacterial toxins enter the body, most often through a wound or incision."
"Aureus, Enterococcus species or various bacterial species from a group known as gram-negative rods."