Ideogram: appeal to nonverbal communication. Concrete poem communicates its own structure: structure-content. Concrete poem is an object in and by itself, not an interpreter of exterior objects and/ or more or less subjective feelings. Its material word (sound, visual form, semantical charge). Its problem: a problem of functions-relations of this material. Factors of proximity and similitude, gestalt psychology. Rhythm: relational force. Concrete poem, by using the phonetical system (digits) and analogical syntax, creates a specific linguistical area-"verbivocovisual" -which shares the advantages of nonverbal communication, without giving up word's virtualities. With the concrete poem occurs the phenomenon of metacommunication: coincidence and simultaneity of verbal and nonverbal communication; only-it must be noted-it deals with a communication of forms, of a structure-content, not with the usual message communication.