di

1

or Di

[ dee ]
/ di /
|

preposition

from; of: used in Italian personal names, originally to indicate place of origin: Conte di Savòia.

Nearby words

  1. dhulia,
  2. dhurrie,
  3. dhuti,
  4. dhílos,
  5. dhāl,
  6. di stéfano,
  7. di-,
  8. di-amelia,
  9. di.,
  10. dia-

Origin of di

1
< Italian < Latin

di

2
[ dee ]
/ di /

noun Music.

a tone in the ascending chromatic scale between do and re.

Origin of di

2
perhaps alteration of do2

Di

[ dahy ]
/ daɪ /

noun

a female given name, form of Diana.

Di

Symbol, Chemistry.

DI

Department of the Interior.
drill instructor.

di-

1

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).
Also dis-2.

Compare mono-.

Origin of di-

1
Middle EnglishLatin < Greek, combining form representing dís twice, double, akin to dýo two. See bi-1, twi-

di-

2

variant of dis-1 before b, d, l, m, n, r, s, v, and sometimes g and j: digest; divide.

di-

3

variant of dia- before a vowel: diorama.

di.

or dia

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for di


British Dictionary definitions for di

Di

the chemical symbol for

didymium

DI

abbreviation for

Defence Intelligence
Detective Inspector
Donor Insemination

di-

1

prefix

twice; two; doubledicotyledon
  1. containing two specified atoms or groups of atomsdimethyl ether; carbon dioxide
  2. a nontechnical equivalent of bi- 1 (def. 5c)

Word Origin for di-

via Latin from Greek, from dis twice, double, related to duo two. Compare bi- 1

di-

2

combining form

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

Word Origin and History for di
Online Etymology Dictionary, © 2010 Douglas Harper

Medicine definitions for di

di-

pref.

Two; twice; double:dichromatic.
Containing two atoms, radicals, or groups:diiodide.

The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

Science definitions for di

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.