R

R is the eighteenth (number 18) letter in the English alphabet.

The Latin alphabet
	Aa	Bb	Cc	Dd
Ee	Ff	Gg	Hh	Ii	Jj
Kk	Ll	Mm	Nn	Oo	Pp
Qq	Rr	Ss	Tt	Uu	Vv
	Ww	Xx	Yy	Zz

18th-century example of use of r rotunda in English blackletter typography

Letter ⟨R⟩ from the alphabet by Luca Pacioli, in De divina proportione (1509)

Meanings for R

• On calendars, R is sometimes used as an short letter for Thursday instead of T, to avoid mistakes with Tuesday.
• In chess, R is a notation symbol for the rook piece.
• In geometry, R is most times a variable for the radius of a circle.
• In navigation, R means the direction "right."
• In movies, R means "restricted."
• In Wheel of Fortune, R is one of the six letters given to any contestant participating in the "Bonus Round."

Related pages

• R (programming language)

Other websites

The dictionary definition of r at Wiktionary
Media related to R at Wikimedia Commons