2. Hence, anything sour; — used also metaphorically. Here's the challenge: . . . I warrant there's vinegar and pepper in't. Shak. Aromatic vinegar, strong acetic acid highly flavored with aromatic substances. — Mother of vinegar. See 4th Mother. — Radical vinegar, acetic acid. — Thieves' vinegar. See under Thief. — Vinegar eel (Zoöl.), a minute nematode worm (Leptodera oxophila, or Anguillula acetiglutinis), commonly found in great numbers in vinegar, sour paste, and other fermenting vegetable substances; — called also vinegar worm. — Vinegar lamp (Chem.), a fanciful name of an apparatus designed to oxidize alcohol to acetic acid by means of platinum. — Vinegar plant. See 4th Mother. — Vinegar tree (Bot.), the stag-horn sumac (Rhus typhina), whose acid berries have been used to intensify the sourness of vinegar. — Wood vinegar. See under Wood.

VINEGAR
Vin"e*gar, v. t.

Defn: To convert into vinegar; to make like vinegar; to render sour
or sharp. [Obs.]
Hoping that he hath vinegared his senses As he was bid. B. Jonson.

VINEGARETTE
Vin`e*gar*ette", n.

Defn: See Vinaigrette, n., 2.

VINEGAR FLY
Vin"e*gar fly.

Defn: Any of several fruit flies, esp. Drosophila ampelopophila, which breed in imperfectly sealed preserves and in pickles.

VINEGARROON
Vin`e*gar*roon", n. [Cf. Sp. vinagre vinegar.]

Defn: A whip scorpion, esp. a large Mexican species (Thelyphonus giganteus) popularly supposed to be very venomous; — from the odor that it emits when alarmed.

VINEGARY
Vin"e*gar*y, a.