Yellows. n.s. A disease in horses. It owes its original to obstructions in the gall-pipe, which are caused by slimy or gritty matter; or to the stoppage of the roots of those little ducts opening into that pipe, by the like matter; or to a compression of them by a fulness and plenitude of the blood-vessels that lie near them. When the gall-pipe, or the roots rather of the common ducts of that pipe, are any wise stopped up, that matter which should be turned into gall is taken up by the vein, and carried back again into the mass of blood, and tinctures it yellow; so that the eyes, inside of the lips, slaver, and all the parts of the horse, that are capable of shewing the colour, appear yellow. Farrier's Dict.
His horse sped with spavins, and raied with the yellows. Shakespeare's Taming of the Shrew.