Other forms: glyphs
A glyph is a symbol — it can represent a word, letter, or number, and it can also be a mark that tells you how to pronounce a letter. In Spanish, the tilde — the wavy line in the letter ñ, as in the word señorita — is an example of a glyph.
If a symbol or mark communicates a piece of valuable information, it's a glyph. In English, each of the letters of the alphabet is a glyph, and in German the character ß is also a glyph. In archaeology, this word is frequently used for any characters that are carved or inscribed in stone — a hieroglyph, an ancient Egyptian picture that represents a word, is one example of this. The Greek root glyphein means "to carve."