Gram-positive
(of bacteria) retaining the violet dye when stained by Gram's method.
Origin of Gram-positive
1Words Nearby Gram-positive
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2024
How to use Gram-positive in a sentence
A Gram-positive stool due to cocci is suggestive of intestinal ulceration.
A Manual of Clinical Diagnosis | James Campbell ToddThe report was "moderate amount of pus cells, few gram positive cocci."
Warren Commission (8 of 26): Hearings Vol. VIII (of 15) | The President's Commission on the Assassination of President KennedySmear, few pus cells, some mucus threads noted, occasional gram positive cocci noted.
Warren Commission (8 of 26): Hearings Vol. VIII (of 15) | The President's Commission on the Assassination of President KennedyThe bacillar threads are in places Gram-negative, in others Gram-positive, and bear small club-like swellings (see Fig. 14).
The Bacillus of Long Life | Loudon DouglasThe Gram-positive bacteria are violet and the Gram-negative are red.
The Fundamentals of Bacteriology | Charles Bradfield Morrey
British Dictionary definitions for Gram-positive
designating bacteria that retain the violet stain in Gram's method
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Scientific definitions for gram-positive
Relating to a group of bacteria that turn a dark-blue color when subjected to a laboratory staining method known as Gram's method. Gram-positive bacteria have relatively thick cell walls and are generally sensitive to the destructive effects of antibiotics or the actions of the body's immune cells. Gram-positive bacteria include beneficial nitrogen-fixing bacteria in soil, as well as the bacteria that cause anthrax, botulism, leprosy, tuberculosis, scarlet fever, and strep throat. Compare gram-negative.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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