Lewis Short
expressĭo (noun F) : exprimo (postAug.)
* A pressing or squeezing out.
* In gen.: mellis,Pall. Jun. 7, 3: spiritus,Vitr. 9, 9.
* In partic.
* In mechanics, a forcing apparatus to raise water, Vitr. 1, 1; 8, 7; cf. 2. expressus.
* In architect., a projection, i. e. a fillet, listel, Vitr. 4, 4 fin.
* Of lang., vividness: summā expressione describere, Ambros. de Cain et Abel, 1, 2, 9.
Charlton T. Lewis, Charles Short, A Latin Dictionary