RD

n. radioactive metallic element (Chemistry)

n. street, paved path for vehicles and pedestrians (used in addresses)

Rd or RD may refer to:Radical Dreamers, a text-based role playing game on the Stellaview made in 1996Rd (digraph)Reader's DigestReasonable Doubt, rapper Jay-Z's debut albumReassurance Directional, a class of road sign that tells the driver how far away particular towns are along that routeRed Destiny, a character in The Big ORegistered DietitianRetinal DetachmentResident Director, a common staff position at universities and colleges with on-campus housingRoad, abbreviationRocketdyneRuby Document formatRutherford (unit), symbol of an unit of radioactivityRyan International Airlines, IATA airline designatorsA MS-DOS/Windows command meaning "remove directory", short for "rmdir"Radio DisneyRural Development, an agency of the United States Department of Agriculture Red DwarfReserve Decoration, an award for service in the Royal Navy ReserveReservoir DogsRD also is a Soviet/Russian prefix for an engine design series, stands for "Reaktivniy Dvigatel" (literally, Reactive Engine), see RD-8 for example
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roughly, approximately, around, about

Rd, radium, radioactive metallic element (Chemistry)

rutherford