a. 1. Pertaining to elves; elvish. [ 1913 Webster ]

2. (Mining) Of or pertaining to certain veins of feldspathic or porphyritic rock crossing metalliferous veins in the mining districts of Cornwall; as, an elvan course.

{ , n. The rock of an elvan vein, or the elvan vein itself; an elvan course. [ 1913 Webster ]