D defs.my
Entry 3 senses · 2 variants Webster, 1913

Vinegar

/vĭn'-əg-ẽr/ · Vin·e·gar · IPA /ˈvɪnəɡɚ/
01 n. A sour liquid used as a condiment, or as a preservative, and obtained by the spontaneous (acetous) fermentation, or by the artificial oxida…
  1. 1.
    A sour liquid used as a condiment, or as a preservative, and obtained by the spontaneous (acetous) fermentation, or by the artificial oxidation, of wine, cider, beer, or the like.
  2. 2.
    Hence, anything sour; -- used also metaphorically.
    “Here's the challenge: . . . I warrant there's vinegar and pepper in't.” Shak.
Phrases & compounds
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 — 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 — a fanciful name of an apparatus designed to oxidize alcohol to acetic acid by means of platinum.
Vinegar plant — See 4th Mother.
Vinegar tree — the stag-horn sumac (Rhus typhina), whose acid berries have been used to intensify the sourness of vinegar.
Wood vinegar — See under Wood.
02 v. t. To convert into vinegar; to make like vinegar; to render sour or sharp.
  1. 1.
    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.