Lewis Short
(adjective) : mōmentārĭus, a, um, id.
* Brief, of brief duration, momentary; quick (postclass.): maritus,i. e. who stays but a short time,App. M. 5, p. 164, 21: vita,id. ib. 2, p. 127, 24: cura,Dig. 34, 1, 8.
* Transf., instantaneous: venenum,that operates quickly,App. M. 10, p. 281, 7.
Charlton T. Lewis, Charles Short, A Latin Dictionary