a large, nonpoisonous whipscorpion, Mastigoproctus giganteus, of the southern U.S. and Mexico, which, when disturbed, emits a volatile fluid having a vinegary odor.
Origin: 1850–55, Americanism; < MexSp vinagrón, equiv. to Sp vinagr(e) vinegar+ -ón aug. suffix
vin·e·gar·roon (vĭn'ĭ-gə-rōōn') n. A large whip scorpion (Mastigoproctus giganteus)of the southern United States and Mexico that emits a strong vinegary odor when disturbed.
[American Spanish vinagrón, from Spanish vinagre, vinegar, from Old Spanish, from Old French vinaigre; see vinegar.]