di
1or Di
from; of: used in Italian personal names, originally to indicate place of origin: Conte di Savòia.
Origin of di
1Other definitions for Di (3 of 9)
a female given name, form of Diana.
Other definitions for Di (4 of 9)
didymium.
Other definitions for DI (5 of 9)
Department of the Interior.
drill instructor.
Other definitions for di- (6 of 9)
a prefix occurring in loanwords from Greek, where it meant “two,” “twice,” “double” (diphthong); on this model, freely used in the formation of compound words (dicotyledon; dipolar) and in chemical terms (diatomic; disulfide).
Origin of di-
6- Also dis-2.
- Compare mono-.
Other definitions for di- (7 of 9)
variant of dis-1 before b, d, l, m, n, r, s, v, and sometimes g and j: digest; divide.
Other definitions for di- (8 of 9)
variant of dia- before a vowel: diorama.
Other definitions for di. (9 of 9)
diameter.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2024
British Dictionary definitions for Di (1 of 4)
didymium
British Dictionary definitions for DI (2 of 4)
Defence Intelligence
Detective Inspector
Donor Insemination
British Dictionary definitions for di- (3 of 4)
twice; two; double: dicotyledon
containing two specified atoms or groups of atoms: dimethyl ether; carbon dioxide
a nontechnical equivalent of bi- 1 (def. 5c)
Origin of di-
3British Dictionary definitions for di- (4 of 4)
variant of dia- diopter
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
Scientific definitions for di-
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® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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