Zerta, a fish caught in the rivers of Italy and some other places, of the figure of the chub, and called by authors capito anadromus, and the blike. It seldom grows to more than two pounds weight, and at times lives in rivers, at times in the sea; and is esteemed a very well-tasted fish, especially a little before the season of its spawning. The zerta is that species of cyprinus described by Gesner and others under the name of capito anadromus.

Zest', the woody thick skin quartering the kernel of a walnut; prescribed by some physicians, when dried and taken with white-wine, as a remedy against the gravel.

Zest is also used for a chip of orange or lemon peel; such as is usually squeezed into ale, wine, &c., to give it a flavour; or the fine oil which spurts out of that peel on squeezing it.