| Term | Full Form | Definition | Meaning | Main Category | Subcategory | Country/ Region | Popularity |
|---|---|---|---|---|---|
| IR | Infrared | Academic & Science › Electronics |  |
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| ir | Iran | Regional › Countries |  |
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| Ir | Iridium | Academic & Science › Chemistry | |
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| IR | Iran Air | Transport & Travel › Airline Codes | |
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| IR | Investor Relations | Business › Business Terms | |
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| IR | Information Retrieval | Computing › General Computing | |
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| IR | International Relations | Governmental › Politics | |
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| IR | Immediate-Release | Medical › Anatomy & Physiology | |
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| IR | Insulin Resistance | Medical › Diseases & Conditions | |
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| IR | Ionizing Radiation | Technology › Tech Terms | |
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| IR | Indian Railways | Transport & Travel › Rail Transport |  |
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| IR | Industrial Relations | Business › Business Terms | |
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| IR | Ingersoll Rand | Stock Exchanges › NYSE |  |
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| IR | Incidence Rate | Business › Business Terms | |
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| IR | Interest Rate | Business › Finance | |
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| IR | Insulin Receptor | Medical › Biochemistry | |
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| IR | Interventional Radiology | Medical › Healthcare | |
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| IR | Institutional Repository | Computing › General Computing | |
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| IR | Internal Router | Computing › Networking | |
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| IR | InterRegio | Transport & Travel › Rail Transport |  |
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| IR | Integrated Resort | Business › Business Terms | |
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| IR | Instruction Register | Computing › General Computing | |
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| IR | Intermediate Representation | Computing › Programming & Development | |
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| IR | Impulse Response | Technology › Tech Terms | |
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| IR | Insulation Resistance | Academic & Science › Electrical | |
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