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Infrared (IR; sometimes called infrared light) is electromagnetic radiation (EMR) with wavelengths longer than that of visible light but shorter than microwaves. The infrared spectral band begins …

All Spanish infinitives end in either -ar, -er, or -ir, as in hablar, leer, and escribir. In this article we'll cover regular -ir verbs and the most common irregulars. Many -ir verbs follow the same …

Looking for online definition of IR or what IR stands for? IR is listed in the World's most authoritative dictionary of abbreviations and acronyms.

IR is an abbreviation for multiple concepts depending on the context. In terms of technology, it often stands for Infrared, referring to a type of light with a wavelength longer than that of red …

Looking for the definition of IR? Find out what is the full meaning of IR on Abbreviations.com! 'Infrared' is one option -- get in to view more @ The Web's largest and most authoritative …

142 definitions of IR. Meaning of IR. What does IR stand for? IR abbreviation. Define IR at AcronymFinder.com

IR-2025-67, June 12, 2025 — The U.S. Department of the Treasury and the Internal Revenue Service today issued Notice 2025-33 extending and modifying the transition relief provided in …

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The meaning of IR is iridium.