vin·e·ga·roon also vin·e·gar·roon 
(vĭn′ĭ-gə-rn)
(vĭn′ĭ-gə-rn)n.
A large whip scorpion (Mastigoproctus giganteus) of the southern United States and Mexico that emits a vinegary-smelling spray when disturbed.
[American Spanish vinagrón, from Spanish vinagre, vinegar, from Old Spanish, from Old French vinaigre; see VINEGAR.]