Lewis Short
prōjectĭo (noun F) : id.
* A throwing forward, a stretching out.
* Lit.: brachii, i e. extension (opp. contractio), Cic. Or. 18, 59: projectiones aquae, jets, Fest. s. v. tullios, p. 352 Müll.
* Transf., concr., like projectura, a projection, in buildings; also,the right to build a projection,Dig. 43, 17, 3, §§ 5 and 6.
Charlton T. Lewis, Charles Short, A Latin Dictionary