a chemical linkage consisting of two covalent bonds between two atoms of a molecule, represented in chemical formulas by two lines, two dots, or four dots, as CH2=CH2; CH2:CH2; CH2::CH2.
Origin of double bond
First recorded in 1885–90
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Examples from the Web for double bond
Historical Examples of double bond
Petroleum when cracked up to make gasoline gives isoprene or other double-bond compounds that go over into some form of rubber.Creative Chemistry
Edwin E. Slosson
a type of chemical bond consisting of two covalent bonds linking two atoms in a molecule
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
n. Symbol Δ
A covalent bond in which two electron pairs are shared between two atoms.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
A type of covalent bond in which two electron pairs are shared between two atoms. Each atom contributes two electrons to the bond. See more at covalent bond.
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