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Gram stain

Definition of the noun gram stain

What does gram stain mean as a name of something?


  1. a staining technique used to classify bacteria; bacteria are stained with gentian violet and then treated with Gram's solution; after being decolorized with alcohol and treated with safranine and washed in water, those that retain the gentian violet are Gram-positive and those that do not retain it are Gram-negative


Gram stain: True indicates positive gram stain.

Printed dictionaries and other books with definitions for Gram stain

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Google previewMosby's Dictionary of Medicine, Nursing and Health Professions - Australian & New Zealand Edition (2014)

by Peter Harris, Sue Nagy, Nicholas Vardaxis

See Gram stain. Gram stain >Hans C.-. Gram], the method of staining microorganisms ...

Google previewBlackie’s Dictionary of Biology (2000)

by Blackie

Gram stain A staining procedure used to visualize and classify bacteria. It allows the identification of purple (Gram–positive) organisms and red (Gram–negative) organisms. Gram-negative Refers to the property of many bacteria that causes ...

Google previewAnatomy, Physiology, Pathology, Bacteriology, Dictionary (1906)

Gram Stain of Stools. Elliott1 used the Gram staining method in 25 gastro- intestinal cases; 16 were negative, 7 positive and 2 mixed. In consideration of the possibility of carcinoma in these cases it was found that among the 16 cases with ...

Google previewEncyclopaedic Dictionary of Biology (2003)

by S. Choudhary

Gram stain : An important method for staining bacteria developed by Christian Gram in 1884. The bacteria are placed as a smear on a slide, then air-dried, then stained first with crystal violet dye and then with Gram's iodine, then washed with ...

Google previewConcise Dictionary of Biomedicine and Molecular Biology (2001)

by Pei-Show Juo

Gram Negative See Gram stain. Gram Positive See Gram stain. Gram Stain A differential stain by which bacteria are classified as Gram (+) or Gram (–) depending upon whether they retain or lose the primary stain (e.g., crystal violet) when ...

Google previewEncyclopedia of Astrobiology (2011)

by Muriel Gargaud

The distinction between gram-positive and ▷ gram-negative bacteria is based on a differential stain, the Gram stain, which depends on the structure of the cell wall (see cell wall). After Gram staining, gram-positive bacteria appear purple and ...

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