I've seen people write (usually in a humorous way) a 'code-like' message where parts of words are replaced with a pictogram that sounds like that word-part. E.G.:
(eyeball) (tin can)(rope knot) get the (hole in ground) (earth) in my head, yet.
I cannot get the whole world in my head, yet.
I once saw this used in a fictional book, and wonder if it has an actual name.
Edit: the answer also helped by re-find this wonderfully imagined race that communicates via rebuses.