Category: Encyclopedias/Dictionaries/Reference
The Gutenberg Webster's Unabridged Dictionary: Section R
R (är). 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. "R is the dog's letter and hurreth in the sound." B. Jonson.