sent from the stars; omenous or evil
• (a.) Relating to the stars. • (a.) Affecting unfavorably by the supposed influence of the stars; baleful.
Sid'er·al adjective [ Latin sideralis . See Sidereal .] 1. Relating to the stars. 2. (Astrol.) Affecting unfavorably by the supposed influence of the stars; baleful. ' Sideral blast.' Milton. 
sideral 1. A reference to the stars; astral; as sideral light. 2. Affecting unfavorably by the supposed influence of the stars; baleful.