Lewis Short
dē-māno, āvi, 1
* V. n., to flow down: tenuis sub artus flamma demanat,Cat. 51, 9; Gell. 17, 11, 1; Porc. Latro decl. in Cat. 10, 29; 36.
* Transf., to descend, be descended from: de patriarcharum genere,Ambros. in Luc. 3, 41 fin.
Charlton T. Lewis, Charles Short, A Latin Dictionary