Verjuice
Verjuice , noun
[Old English vergeous, French 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.