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di1

or Di

[dee] /di/
preposition
1.
from; of: used in Italian personal names, originally to indicate place of origin:
Conte di Savòia.
Origin of di1
< Italian < Latin

di2

[dee] /di/
noun, Music.
1.
a tone in the ascending chromatic scale between do and re.
Origin
perhaps alteration of do2

Di

[dahy] /daɪ/
noun
1.
a female given name, form of Diana.

Di

Symbol, Chemistry.
1.

DI

1.
Department of the Interior.
2.
drill instructor.

di-1

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

di-2

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

di-3

1.
variant of dia- before a vowel:
diorama.

di.

or dia

1.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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Examples from the Web for di
Contemporary Examples
Historical Examples
  • Bad anyway, seeing there was only two di'monds betwixt three men.

    Tom Sawyer, Detective Mark Twain (Samuel Clemens)
  • And when Tom held up the other di'mond he looked sorrier than ever.

    Tom Sawyer, Detective Mark Twain (Samuel Clemens)
  • She called him vigliacco—papa, a Panacci, dei Duchi di Vedrano!

    A Spirit in Prison Robert Hichens
  • Neither of us said anything for a spell, breath bein' scurce as di'monds.

    The Depot Master Joseph C. Lincoln
  • The inducement of the throne of Naples had been held out to Marchese di Pescara.

    Italy, the Magic Land Lilian Whiting
British Dictionary definitions for di

Di

Chemical symbol
1.
didymium

DI

abbreviation
1.
Defence Intelligence
2.
Detective Inspector
3.
Donor Insemination

di-1

prefix
1.
twice; two; double: dicotyledon
2.
  1. containing two specified atoms or groups of atoms: dimethyl ether, carbon dioxide
  2. a nontechnical equivalent of bi-1 (sense 5c)
Word Origin
via Latin from Greek, from dis twice, double, related to duo two. Compare bi-1

di-2

combining form
1.
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
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Word Origin and History for di

di-

1

word-forming element meaning "two, double, twice," from Greek di-, from dis "twice," related to duo (see two).

di-

2

word-forming element meaning "apart, asunder," form of dis- before certain voiced consonants.

di-

3

word-forming element meaning "through; thoroughly," form of dia- before vowels.

Online Etymology Dictionary, © 2010 Douglas Harper
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di in Medicine

di- pref.

  1. Two; twice; double: dichromatic.

  2. 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.
Cite This Source
di in Science
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 © 2002. Published by Houghton Mifflin. All rights reserved.
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Slang definitions & phrases for di

DI

noun

A drill instructor; noncommissioned officer in charge of recruits (1913+ Marine Corps)

The Dictionary of American Slang, Fourth Edition by Barbara Ann Kipfer, PhD. and Robert L. Chapman, Ph.D.
Copyright (C) 2007 by HarperCollins Publishers.
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