Constituents to be reduplicated may in principle be definable either monomodally or bimodally. Thus, they may be definable either by their meaning properties only, or by their sound properties only, or in reference to both. They may, in other words, be either semantic-syntactic constituents, such as one or more semantic-syntactic features, or morpheme, or words, or phrases, or sentences, or discourses; or they may be phonetic-phonological terms, such as one or more phonetic-phonological features, or segments, or syllables; or they may be morphemes of a particular number of phonetic segments; etc.
- Moravcsik (2004), a pag.313