The three letter abbreviation TLR can mean

• Teaching and Learning Responsibility - a category for the award of supplementary pay in teachers' salaries in England

• Toll-like receptors, proteins constituting an important part of the immune system
• tonic labyrinthine reflex, a primitive reflex found in newborn humans
• twin-lens reflex camera, a photo camera with two lenses
• Texas Law Review
• TLR, a motorcycle with a 998cc v-twin engine manufactured by Suzuki
• The IATA airport code for Mefford Field, California, USA
• Tubal Ligation Reversal Tubal reversal, Surgery to open and reconnect the fallopian tube after a tubal ligation procedure.
• Air Libya, Libya (ICAO airline code)
• A nickname for St. Louis Cardinals manager Tony La Russa
• Test Lab Report

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