Source : Webster's Revised Unabridged Dictionary (1913)

Jararaca \Jar`a*ra"ca\, n. [Pg., from the native name.]
   (Zo["o]l.)
   A poisonous serpent of Brazil ({Bothrops jararaca}), about
   eighteen inches long, and of a dusky, brownish color,
   variegated with red and black spots.