Gram-negative

[ gram-neg-uh-tiv ]

/ ˈgræmˈnɛg ə tɪv /

adjective (often lowercase)

(of bacteria) not retaining the violet dye when stained by Gram's method.

Origin of Gram-negative

First recorded in 1905–10; see origin at Gram's method

Words nearby Gram-negative

grammatology, gram-meter, gram-molecular weight, gram molecule, Grammy, Gram-negative, Gramont, gramophone, grampa, Grampian, Grampian Mountains

Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Example sentences from the Web for Gram-negative

The latter are Gram-negative, and vary greatly in both dimensions as well as in form.
The Bacillus of Long Life|Loudon Douglas
The 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 Douglas
This method is excellent for differentiating Gram-positive and Gram-negative organisms on the same slide.
The Fundamentals of Bacteriology|Charles Bradfield Morrey
The Gram-positive bacteria are violet and the Gram-negative are red.
The Fundamentals of Bacteriology|Charles Bradfield Morrey

The organism is a short, thick diplobacillus, is frequently intracellular, and is Gram-negative (Fig. 126).
A Manual of Clinical Diagnosis|James Campbell Todd

British Dictionary definitions for Gram-negative

Gram-negative

adjective

designating bacteria that fail to 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

Medical definitions for Gram-negative

gram-negative

adj.

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

Scientific definitions for Gram-negative

gram-negative

Relating to a group of bacteria that do not change color when subjected to the laboratory staining method known as Gram's method or Gram's stain. Gram-negative bacteria have relatively thin cell walls and are generally resistant to the effects of antibiotics or the actions of the body's immune cells. Gram-negative bacteria include E. coli and the bacteria that cause gonorrhea, typhoid fever, rickettsial fever, cholera, syphilis, plague, and Lyme disease. Compare gram-positive.

单词	gram-negative
释义	Gram-negative [ gram-neg-uh-tiv ] / ˈgræmˈnɛg ə tɪv / adjective (often lowercase) (of bacteria) not retaining the violet dye when stained by Gram's method. Origin of Gram-negative First recorded in 1905–10; see origin at Gram's method Words nearby Gram-negative grammatology, gram-meter, gram-molecular weight, gram molecule, Grammy, Gram-negative, Gramont, gramophone, grampa, Grampian, Grampian Mountains Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020 Example sentences from the Web for Gram-negative The latter are Gram-negative, and vary greatly in both dimensions as well as in form. The Bacillus of Long Life\|Loudon Douglas The 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 Douglas This method is excellent for differentiating Gram-positive and Gram-negative organisms on the same slide. The Fundamentals of Bacteriology\|Charles Bradfield Morrey The Gram-positive bacteria are violet and the Gram-negative are red. The Fundamentals of Bacteriology\|Charles Bradfield Morrey The organism is a short, thick diplobacillus, is frequently intracellular, and is Gram-negative (Fig. 126). A Manual of Clinical Diagnosis\|James Campbell Todd British Dictionary definitions for Gram-negative Gram-negative adjective designating bacteria that fail to 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 Medical definitions for Gram-negative gram-negative adj. Of, relating to, or being a bacterium that does not retain 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. Scientific definitions for Gram-negative gram-negative Relating to a group of bacteria that do not change color when subjected to the laboratory staining method known as Gram's method or Gram's stain. Gram-negative bacteria have relatively thin cell walls and are generally resistant to the effects of antibiotics or the actions of the body's immune cells. Gram-negative bacteria include E. coli and the bacteria that cause gonorrhea, typhoid fever, rickettsial fever, cholera, syphilis, plague, and Lyme disease. Compare gram-positive. The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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