R, the eighteenth letter of the English alphabet, is a vocal consonant. It is sometimes called a semivowel, and a liquid. See Guide to Pronunciation, // 178, 179, and 250-254.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). r. Retrieved September 21, 2026, from http://smartdefine.org/r/definitions/2052150 |
| Chicago | Webster's. 2011. "r" http://smartdefine.org/r/definitions/2052150 (accessed September 21, 2026). |
| Harvard | Webster's 2011, r, Smart Define, viewed 21 September, 2026, <http://smartdefine.org/r/definitions/2052150>. |
| MLA | Webster's. "r" 27 May 2011. Web. 21 September 2026. <http://smartdefine.org/r/definitions/2052150> |