RK

Look up RK in Wiktionary, the free dictionary.

RK may refer to:

• Radial keratotomy, a surgical procedure on the eye
• Rhodopsin kinase, an enzyme
• r/K selection theory, in biology, relating to the trade-off between quantity and quality of offspring
• Runge–Kutta methods, in numerical analysis

• Royal Khmer Airlines (former IATA code: RK), ceased operations 2007
• R Airlines (former IATA code: RK), ceased operations 2018
• Ryanair UK (IATA code: RK), UK based subsidiary airline of Ryanair

• Raising Kaine, a defunct Virginia political blog
• Reichskommissariat, a historical Nazi territorial division
• Rangkasbitung railway station, station code RK
• Ridwan Kamil, former governor of West Java province since 2018-2023

• RK (RynnäkköKivääri), Finnish assault rifles; for example RK 62
• Republic of Korea (ROK)
• Republic of Kazakhstan

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