Dictionaries, Thesauruses, Pictures, and Press Releases
- RNA splicing
- RNP
- road base
- roadstone
- roadway construction
- robber flies
- Roberts, Isaac
- Roberts-Austen, William Chandler
- Roberval, Gilles Personne (or Personier) De
- robin's pin-cushion gall
- Robin, Charles-Phillipe
- Robinet, Jean-Baptiste René
- robins pincushion gall
- Robins, Benjamin
- Robinson, Abraham
- Robiquet, Pierre-Jean
- Robison, John
- Roccella
- Rochalimaea
- Roche, Édouard Albert