Encyclopedias, Almanacs, Transcripts, and Maps
- Rabbi Ben Ezra
- rabbit fever
- rabbitbrush
- Rabbith
- Rabboni
- Rabinowich, Sholem
- Racan, Honorat de Bueil, seigneur de
- racemic acid
- Rachal
- Radama I
- Radcliffe College
- Radetzky, Joseph, Graf Radetzky de Radetz
- radiant heating
- radiation chemistry
- radiation weapon
- Radić, Stjepan
- Radich, Stefan
- Radičová, Iveta
- Radiguet, Raymond
- radio altimeter