n. [ Phono- + -gram. ] 1. A letter, character, or mark used to represent a particular sound. [ 1913 Webster ]

Phonograms are of three kinds: (1) Verbal signs, which stand for entire words; (2) Syllabic signs, which stand for the articulations of which words are composed; (3) Alphabetic signs, or letters, which represent the elementary sounds into which the syllable can be resolved. I. Taylor (The Alphabet). [ 1913 Webster ]

2. A record of sounds made by a phonograph. [ 1913 Webster ]

adj. Of or pertaining to a phonogram. [ WordNet 1.5 ]