- RK
RK may stand for:
*Radial keratotomy
*Rikenium (Rk), a proposed name for Ununtrium
*Royal Khmer Airlines ' IATA airline designator
*Riddlin' Kids , a punk rock band from Austin, Texasee also
*
Linux/RK
*RK4 , a fourth-order Runge-Kutta method
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