"(as pronounced), finely-powdered sea-shell, which when blown through a tube into the eye cures eye-trouble in horses, cattle, and human beings, according to a Ballaugh farmer, who has no other name for the shell. See, however, "Shuggiloon" (the razor-shell) in V.A.D.; also A Second Manx Scrapbook, page 186, where the shell is wrongly supposed to be long and narrow; it is between two and three inches broad. Cregeen has "Braain-olley, the shell of the razor fish bruised to powder," from braain, a quern, and probably fooilliagh, residue; which suggests that at one time the use of the term was not limited to shells."
—W. Walter Gill, Manx Dialect Words and Phrases, 1934