In this paper I aim at showing that, in Aristotle's view, spoken and written language differ in their material organisation, in particular in their respective part-whole relations. I argue that, according to Aristotle, written language is an additive system (i.e. a system whose parts exist and are produced prior to what they are parts of), whereas spoken language is a non-additive system (i.e. a system whose parts cannot exist and be produced prior to what they are parts of), and that, in his view, spoken language, qua non-additive system, is analogous to organisms. Further, I outline two possible implications of this hypothesis. The first concerns the relevance of Aristotle's conception of spoken language as a non-additive system to his ac...