di

or Di

[ dee ]

/ di /

preposition

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

Origin of di

<Italian <Latin dē

Definition for di (2 of 9)

di²

[ dee ]

/ di /

noun Music.

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

Origin of di

perhaps alteration of do²

Definition for di (3 of 9)

[ dahy ]

/ daɪ /

noun

a female given name, form of Diana.

Definition for di (4 of 9)

Symbol, Chemistry.

didymium.

Definition for di (5 of 9)

Department of the Interior.

drill instructor.

Definition for di (6 of 9)

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-

Middle English ≪ Latin <Greek, combining form representing dís twice, double, akin to dýotwo. See bi-¹, twi-

Definition for di (7 of 9)

di-²

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

Definition for di (8 of 9)

di-³

variant of dia- before a vowel: diorama.

Definition for di (9 of 9)

di.

or dia

diameter.

Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020

British Dictionary definitions for di (1 of 4)

the chemical symbol for

didymium

British Dictionary definitions for di (2 of 4)

abbreviation for

Defence Intelligence

Detective Inspector

Donor Insemination

British Dictionary definitions for di (3 of 4)

di-¹

prefix

twice; two; doubledicotyledon

containing two specified atoms or groups of atomsdimethyl ether; carbon dioxide
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

British Dictionary definitions for di (4 of 4)

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

Medical definitions for di

di-

pref.

Two; twice; double:dichromatic.

Containing two atoms, radicals, or groups:diiodide.

Scientific 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.

单词	di
释义	di ¹ or Di [ dee ] / di / preposition from; of: used in Italian personal names, originally to indicate place of origin: Conte di Savòia. Origin of di ¹ <Italian <Latin dē Definition for di (2 of 9) di² [ dee ] / di / noun Music. a tone in the ascending chromatic scale between do and re. Origin of di ² perhaps alteration of do² Definition for di (3 of 9) Di [ dahy ] / daɪ / noun a female given name, form of Diana. Definition for di (4 of 9) Di Symbol, Chemistry. didymium. Definition for di (5 of 9) DI Department of the Interior. drill instructor. Definition for di (6 of 9) 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 English ≪ Latin <Greek, combining form representing dís twice, double, akin to dýotwo. See bi-¹, twi- Definition for di (7 of 9) di-² variant of dis-¹ before b, d, l, m, n, r, s, v, and sometimes g and j: digest; divide. Definition for di (8 of 9) di-³ variant of dia- before a vowel: diorama. Definition for di (9 of 9) di. or dia diameter. Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020 British Dictionary definitions for di (1 of 4) Di the chemical symbol for didymium British Dictionary definitions for di (2 of 4) DI abbreviation for Defence Intelligence Detective Inspector Donor Insemination British Dictionary definitions for di (3 of 4) di-¹ prefix twice; two; doubledicotyledon containing two specified atoms or groups of atomsdimethyl ether; carbon dioxide 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 British Dictionary definitions for di (4 of 4) 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 Medical 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. Scientific 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.
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