producing a surplus; profitable
Lucre, from the Lat. lucrum, meaning gain in terms of money or wealth.
Often it is used in a negative manner, as in the phrase “not given to filthy lucre.” from the Bible Bible verse 1|Timothy|3:3|AV.
From this, the term "the filthy" became slang for money. http://www.phrases.org.uk/meanings/filthy-rich.html
Uses In Fiction
lucrative in French: Lucre