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Definition of r

What is the definition of "r"?
  • rnoun
  • 1. The 18th letter of the modern English alphabet.
    2. Any of the speech sounds represented by the letter r.
    3. The 18th in a series.
    4. Something shaped like the letter R.


  • rabbreviation
  • 1. radius


Use "r" in a sentence
  • "An uncharged black hole has no inner horizon; it should come as no surprise, then, that as you increase the charge (keeping the mass of the black hole fixed), the two horizons at r+ and r - come together."

    "In an extremal black hole, where all of the energy comes from the electric field itself, the two horizons coincide: we have r+ = r - (extremality)."

    "A representation r is maximally consistent if and only if r is consistent and for any representation r², either r & not-r² is not consistent or r & r² is not consistent (assuming the appropriate conceptions of the negation and conjunction of representations)."

Translate r

How to Say "r" in:
  • Spanish: r
  • German: r
  • French: r
  • Mandarin: r
  • Japanese: r

Words Like r