Try Our Apps


Avoid these words. Seriously.


[gram-poz-i-tiv] /ˈgræmˈpɒz ɪ tɪv/
adjective, (often lowercase)
(of bacteria) retaining the violet dye when stained by Gram's method.
Origin of Gram-positive
First recorded in 1905-10; See origin at Gram's method Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
Cite This Source
Examples from the Web for Gram-positive
Historical Examples
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
Cite This Source
Gram-positive in Medicine

gram-positive or Gram-positive (grām'pŏz'ĭ-tĭv)
Of, relating to, or being a bacterium that retains the violet stain used in Gram's method.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
Cite This Source
Gram-positive in Science
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 © 2002. Published by Houghton Mifflin. All rights reserved.
Cite This Source

Word of the Day

Nearby words for gram-positive

Word Value for Gram

Scrabble Words With Friends