There are 2 definitions of Ir in English:

Ir1

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symbol

The chemical element iridium.

Definition of Ir in:

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Word of the day envenom
Pronunciation: ɪnˈvɛnəm
verb
put poison on or into; make poisonous

There are 2 definitions of Ir in English:

IR2

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abbreviation

1Infrared.
1.1Iran (international vehicle registration).

Definition of Ir in: