Definitions for ir-
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Random House Webster's College Dictionary
IR
infrared.
Category: Physics
Ir
Irish.
Category: Peoples
Ir*
iridium.
Category: Chemistry
* Chem. Symbol..
ir-
irradiate.
Category: Affix
Ref: var. of in-2 4 2 (by assimilation) before r:
ir-
irreducible.
Category: Affix
Ref: var. of in-3 4 3 (by assimilation) before r:
Ir.
Ireland.
Category: Geography (places)
Wiktionary
ir-(Prefix)
not; negation.
Origin: Variant of in- by assimilation, used before r.
Webster Dictionary
Ir-(u)
a form of the prefix in-. See In-
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