What we need to be aware of when writing textual ontology term definitions, is that they have a preferred syntax. To be coherent with the formal (logical) definition and thus easier to parse by the human reader, textual definitions in an ontology should use an Aristotelian structure, which can be divided into the Genus of a term, that is its superclass within the ontology, and the Differentia, which refers to a phrase that states in how far the term is a specialization (subclass) of the Genus. Accordingly, a good textual definition follows the structure: X is a Y that Z. Oftentimes a term has multiple labels or synonyms and there are different ways to express this with distinct annotation properties. For the maintainability of an ontology, it is thus more convenient when textual definitions do not include the preferred term label. Accordingly, we can shorten the generic pattern of the literal definition from X is a Y that Z to a Y that Z.