Phonogram (linguistics)
A phonogram is a grapheme which represents a phoneme or combination of phonemes, such as the letters of the Latin alphabet or the Japanese kana. For example, "igh" is an English-language phonogram that represents the hard "I" sound in "high". Whereas the word phonemes refers to the sounds, the word phonogram refers to the letter that represent that sound.
Phonograms contrast with logograms, which represent words and morphemes, and determinatives, silent characters used to mark semantic categories.