Di meaning

Diameter.
abbreviation
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Di is defined as an abbreviation for drill instructor or diameter, or the symbol for didymium.

An example of di is the officer that teaches new soldiers about the military.

An example of di is the length of a line down the center of a circle.

An example of di is the symbol for a metallic mixture.

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Diagnostic imaging.
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Two; twice; double.

Dichromatic.

prefix
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Containing two atoms, radicals, or groups.

Dichloride.

prefix
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Didymium.
symbol
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Drill instructor.
abbreviation
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Twice, double, twofold.

Dichroism, dicotyledon.

affix
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Having two atoms, molecules, radicals, etc.

Diacid.

affix
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affix
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affix
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Diagnostic imaging.
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Donor insemination.
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A prefix that means “two,” “twice,” or “double.” It is used commonly in chemistry, as in dioxide, a compound having two oxygen atoms.
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Plural form of deus.
noun
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Donor insemination.
abbreviation
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Drill instructor.
abbreviation
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Origin of di

  • Gr di- < dis-, twice < IE *dwis (> L bis, MHG zwis) < base *dwo, two
    From Webster's New World College Dictionary, 5th Edition
  • Greek dwo- in Indo-European roots
    From American Heritage Dictionary of the English Language, 5th Edition