noun Chemistry, Pharmacology.

a colorless, thick, oily, flammable, highly explosive, slightly water-soluble liquid, C3H5N3O9, prepared from glycerol with nitric and sulfuric acids: used chiefly as a constituent of dynamite and other explosives, in rocket propellants, and in medicine as a vasodilator in the treatment of angina pectoris.

Also ni·tro·glyc·er·ine [nahy-truh-glis-er-in, -uh-reen] /ˌnaɪ trəˈglɪs ər ɪn, -əˌrin/.

Origin of nitroglycerin

First recorded in 1855–60; nitro- + glycerin
Also called glonoin, glyceryl trinitrate, trinitroglycerin. Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for nitroglycerin

Contemporary Examples of nitroglycerin

  • Having Lou Dobbs and Rick Kaplan reporting to me at the same time was like holding a canister of nitroglycerin in each hand.

    The Daily Beast logo
    What Happened to the Real Lou?

    Lloyd Grove

    August 5, 2009

Historical Examples of nitroglycerin

nitroglycerin in Medicine



A thick, pale yellow liquid that is explosive on concussion or exposure to sudden heat, used as a vasodilator in medicine.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

nitroglycerin in Science



A thick, pale-yellow, explosive liquid formed by treating glycerin with nitric and sulfuric acids. It is used to make dynamite and in medicine to dilate blood vessels. Chemical formula: C3H5N3O9.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.