2. A symbol used for convenience, or for abbreviation; as, 1, 2, 3, +, -,

3. A phonetic symbol; a letter.

IDEOGRAPH
I*de"o*graph, n.

Defn: Same as Ideogram.

IDEOGRAPHIC; IDEOGRAPHICAL
I`de*o*graph"ic, I`de*o*graph"ic*al, a. Etym: [Cf. F. idéographique.]

Defn: Of or pertaining to an ideogram; representing ideas by symbols, independently of sounds; as, 9 represents not the word "nine," but the idea of the number itself. — I`de*o*graph"ic*al*ly, adv.

IDEOGRAPHICS
I`de*o*graph"ics, n.

Defn: The system of writing in ideographic characters; also, anything so written.

IDEOGRAPHY
I`de*og"ra*phy, n.

Defn: The representation of ideas independently of sounds, or in an ideographic manner, as sometimes is done in shorthand writing, etc.