LAT

Lewis Short

ŏpĕrūla (noun F) : dim.opera
* A little trouble, slight service (post-class.), Dig. 50, 14, 3.
* Transf., earnings, gain (postclass.): operulas merere,App. M. 1, p. 105, 31.
Charlton T. Lewis, Charles Short, A Latin Dictionary

TLL

s. TLL
Thesaurus Linguae Latinae
memory