Also found in: Medical, Acronyms, Encyclopedia, Wikipedia.
1. Two; twice; double: dichromatic.
2. Containing two atoms, radicals, or groups: dichloride.
Variant of dia-.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
1. twice; two; double: dicotyledon.
a. containing two specified atoms or groups of atoms: dimethyl ether; carbon dioxide.
b. a nontechnical equivalent of bi-15c
[via Latin from Greek, from dis twice, double, related to duo two. Compare bi-1]
variant of dia-: diopter.
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
a combining form meaning “two,” “double”: diamide; dicotyledon; dihedron. Compare dis- 2.
var. of dis- 1 before b, d, l, m, n, r, s, v, and sometimes g and j: digest; divide.
var. of dia- before a vowel: diorama.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
A prefix that means "two," "twice," or "double." It is used commonly in chemistry, as in dioxide, a compound having two oxygen atoms.
The American Heritage® Student Science Dictionary, Second Edition. Copyright © 2014 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.