Elvan /(?)/

Elv·an

Elvan

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

Elvan

n.
  1. The rock of an elvan vein, or the elvan vein itself; an elvan course.