Emily Dickinson Lexicon

GRAPE, n. [This word is from the root of grab, gripe, and signifies primarily a cluster or bunch; Fr. grappe de raisin, a bunch of grapes; W. grab, a cluster, a grape; grabin, a clasping; It. grappa, a grappling; grappo, a cluster, a bunch of grapes.]

1. Properly, a cluster of the fruit of the vine; but with us, a single berry of the vine; the fruit from which wine is made by expression and fermentation.
2. In the manege, grapes signifies mangy tumors on the legs of a horse.