(Internet slang) Initialism of if I recall/remember correctly.

(space science) Abbreviation of distant retrograde orbit. / Abbreviation of digital readout.

(Canada, US, sports television) A time-out taking place during a televised sports match where the game clock is stopped for a period of time to allow for TV commercials to air before the resumption...

(anatomy) Of the azygos vein and the esophagus.