Lewis Short
sessĭto, āvi, 1
* V. freq. n. [id.], to sit much or long (very rare): quam deam (Suadam) in Pericli labris scripsit Eupolis sessitavisse, * Cic. Brut. 15, 59: sessitandi regio,of the seat, of the posteriors,App. Dogm. Plat. 1, p. 10, 40.
Charlton T. Lewis, Charles Short, A Latin Dictionary