R-2
— Navneord
– Engelsk
~ street names for flunitrazepan
R
— Navneord
– Engelsk
~ (physics) the universal constant in the gas equation: pressure times volume = R times temperature; equal to 8.3143 joules per kelvin per mole
R and B
— Navneord
– Engelsk
~ a combination of blues and jazz that was developed in the United States by Black musicians; an important precursor of rock 'n' roll