Alb

Webster's Dictionary

(n.) A vestment of white linen, reaching to the feet, an enveloping the person; - in the Roman Catholic church, worn by those in holy orders when officiating at mass. It was formerly worn, at least by clerics, in daily life.

Cyclopedia of Biblical, Theological and Ecclesiastical Literature

in Scandinavian mythology, was the spirit of the night, or the nightmare; the succubus of mediaeval writers.