1. (

• spectral

) of or relating to a spectrum; "spectral colors"; "spectral analysis" ;

2. (

• apparitional ,
• ghostlike ,
• ghostly ,
• phantasmal ,
• spectral ,
• spiritual

) resembling or characteristic of a phantom; "a ghostly face at the window"; "a phantasmal presence in the room"; "spectral emanations"; "spiritual tappings at a seance" ;