OTR

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Look up OTR in Wiktionary, the free dictionary.

Otr or OTR may refer to:

• Ótr, a dwarf in Norse mythology
• Otr, the abbreviation for the orchid genus Otaara
• Coto 47 Airport (IATA: OTR, ICAO: MRCC), an airport that serves Coto 47, Costa Rica

OTR is an acronym for:

• Optical Transition Radiation, in physics, the radiation emitted by a charged beam at the interface between two mediums
• Oxygen transmission rate, a measure of a barrier material's oxygen permeability
• Off-the-Record Messaging, an instant messenger encryption protocol
• Organisation and Technology Research (OTR plc), a European information technology research company
• Over-the-Rhine, the Cincinnati, USA neighborhood
• On the Run (convenience store), an international convenience store chain owned by ExxonMobil
• On the rag, a woman's period; flow; menstrual cycle
• Occupational Therapist Registered

In media:

• Old-time radio, or "Golden Age Radio", a term describing an era of radio programmes in the first half of the 20th century
• Off The Record (OTR/PRESS News Agency), a Spanish newswire for media
• Off The Record (TV series), a Canadian sports talk show

In music:

• On The Rocks (band), a rock band featuring British, Dutch and Brazilian members
• Over the Rhine, an Ohio, USA based band
• Otierre or OTR (Originale Trasmissione del Ritmo), an Italian hip hop band

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