What is "alquifou"

Alquifou \Al"qui*fou\, n. [Equiv. to arquifoux, F. alquifoux, Sp. alquif['o]l, fr. the same Arabic word as alcohol. See Alcohol.] A lead ore found in Cornwall, England, and used by potters to give a green glaze to their wares; potter's ore.

n. A lead ore found in Cornwall, England, and used to give a green glaze to pottery.

Alquifou (based, along with the word alcohol, on the Arabic word "al-kuhl"), is a lead ore found in Cornwall, England, used by potters for its green glaze.