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di1

or Di

[dee]
See more synonyms on Thesaurus.com
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]
noun Music.
  1. a tone in the ascending chromatic scale between do and re.

Origin of di2

perhaps alteration of do2

Di

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

Di

Symbol, Chemistry.
  1. didymium.

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 of di-1

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. diameter.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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

the chemical symbol for
  1. didymium

DI

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

di-1

prefix
  1. 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

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

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

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.

di in Science

di-

  1. 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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