VERJUICE

Etymology

Noun

verjuice (usually uncountable, plural verjuices)

A very acidic juice made by pressing unripe grapes.

Source: Wiktionary

Ver"juice`, n. Etym: [OE. vergeous, F. verjus, that is, the juice of green fruits; verd, vert, green + jus juice. See Verdant, and Juice.]

1. The sour juice of crab apples, of green or unripe grapes, apples, etc.; also, an acid liquor made from such juice.

2. Tartness; sourness, as of disposition.

Source: Webster’s Unabridged Dictionary 1913 Edition