dē-māno, āvi, 1,
I 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.—
II Transf., to descend, be descended from : de patriarcharum genere, Ambros. in Luc. 3, 41 fin.
dē-mānō —, —, āre, to flow down, glide down, Ct. ...
An Elementary Latin Dictionary