Definitions for dia-
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Random House Webster's College Dictionary
dia-
a prefix occurring orig. in loanwords from Greek, with the meanings “through, across, from point to point” (diachronic; diameter; diarrhea), “in different directions, apart, at an angle” (dialysis; diastole ), “completeness or thoroughness (of the action of the verb)” (diagnosis).
Category: Affix
Ref: Also, esp. before a vowel, di-. 5 3
Origin of dia-:
< Gk, comb. form repr. diá (prep.) through, across, akin to dýotwo and di-di -1
dia.
diameter.
Category: Math
Wiktionary
dia-(Prefix)
Through, across.
Origin: From prefix δια-, from διά
Webster Dictionary
Dia-
alt. of Di-
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