Found 5,052 definitions starting with R:

Are we missing a good definition here?

Free, no signup required:

Add to Chrome

Get instant definitions for any word that hits you anywhere on the web!

Free, no signup required:

Add to Firefox

Get instant definitions for any word that hits you anywhere on the web!

Quiz

Are you a words master?

»
the substance that is acted upon by an enzyme or ferment
  • A. substrate
  • B. urus
  • C. nidus
  • D. scalawag