[ streyt-cheyn ]
/ ˈstreɪtˈtʃeɪn /
an open chain of atoms, usually carbon, with no side chains attached to it.
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Compare branched chain.
Origin of straight-chain
First recorded in 1925–30
Also called straight chain.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
British Dictionary definitions for straight chain
- an open chain of atoms in a molecule with no attached side chains
- (as modifier)a straight-chain hydrocarbon
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
Science definitions for straight chain
An arrangement of atoms of the same type that forms an unbranched open chain. Propane is a straight-chain compound with a chain of three carbon atoms.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.