(Science: zoology) A common, large, handsome, American swallowtail butterfly, now regarded as one of the forms of papilio, or Jasoniades, glaucus. The wings are yellow, margined and barred with black, and with an orange-red spot near the posterior angle of the hind wings. Called also tiger swallowtail.
Origin: NL, fr. L. Turnus, the king of the Rutuli, mentioned in the aeneid.