Lewis Short
interpŏsĭtĭo (noun F) : interpono
* A putting between, insertion.
* In gen.: tetrastyli, propter columnarum interpositiones, spatiosiores constituantur,Vitr. 5, 3, 8.
* Esp.
* An inserting or introduction of persons in discourse: personarum,Cic. Inv. 1, 6, 8; of words: una interpositio difficilior est,id. Fam. 16, 22, 1.
* A rhet. figure, parenthesis, Quint. 9, 3, 23.
Charlton T. Lewis, Charles Short, A Latin Dictionary