Lewis Short
(adjective) : rŏsācĕus, a, um, rosa
* Made of roses, rose- (Plinian): corona,Plin. 21, 3, 6, § 8: ceratum,id. 24, 13, 73, § 119: oleum,id. 15, 7, 7, § 30.—As subst.: rŏsācĕum, i, n., oil of roses, Plin. 22, 24, 50, § 108; 32, 7, 23, § 68.
Charlton T. Lewis, Charles Short, A Latin Dictionary