rebus

n. (pl. Rebuses) representation of a word (esp. A name) by pictures etc. Suggesting its parts. [latin rebus, ablative pl. Of res thing]

n. A mode of expressing words and phrases by pictures of objects whose names resemble those words, or the syllables of which they are composed; enigmatical representation of words by figures; hence, a peculiar form of riddle made up of such representations.