ideogram

n. [ Ideo- + -gram; cf. F. idéograme. ] 1. An original, pictorial element of writing; a kind of hieroglyph expressing no sound, but only an idea. [ 1913 Webster ]

Ideograms may be defined to be pictures intended to represent either things or thoughts. I. Taylor (The Alphabet). [ 1913 Webster ]

You might even have a history without language written or spoken, by means of ideograms and gesture. J. Peile. [ 1913 Webster ]

2. A symbol used for convenience, or for abbreviation; as, 1, 2, 3, +, -, &unr_;, $, &unr_;, etc. [ 1913 Webster ]

3. A phonetic symbol; a letter. [ 1913 Webster ]