Dia Definition

dīə
prefix
Through.
Diachronic.
American Heritage
Across.
Diatropism.
American Heritage
Dia is defined as going through or across or between.
An example of dia used as a prefix is in the word "diagnosis," which means a thorough analysis of a disease.
YourDictionary
affix
Through, throughout, across.
Diachronic, diagram.
Webster's New World
Apart, between.
Dialect, diacritical.
Webster's New World
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other
A prefix meaning “through” or “across,” as in diameter, the length of a line going through a circle.
American Heritage Science

Origin of Dia

  • ME < OFr < L < Gr dia, through, across < *disa, in two, apart < IE *dis- < base *dwo, two

    From Webster's New World College Dictionary, 5th Edition

  • Greek from dia through

    From American Heritage Dictionary of the English Language, 5th Edition

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