The Collaborative International Dictionary
Turnus \Tur"nus\, n. [NL., fr. L. Turnus, the king of the Rutuli, mentioned in the [AE]neid.] (Zo["o]l.) A common, large, handsome, American swallowtail butterfly, now regarded as one of the forms of Papilio glaucus syn. 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. See Illust. under Swallowtail.
Wikipedia
In Virgil's Aeneid, Turnus was the King of the Rutuli, and the chief antagonist of the hero Aeneas.
Usage examples of "turnus".
Yes, it would be hymned down the ages so loudly that it would put Aeneas and Turnus to shame!
Madam, your father, and the Arabian king, The first affecter of your excellence, Come now, as Turnus 'gainst Aeneas did, Armed with lance into the Aegyptian fields, Ready for battle 'gainst my lord the king.
Ambitious Turnus in the press appears, And, aggravating crimes, augments their fears.
Now Turnus doubts, and yet disdains to yield, But with slow paces measures back the field, And inches to the walls, where Tiber's tide, Washing the camp, defends the weaker side.
Restless Amata lay, her swelling breast Fir'd with disdain for Turnus dispossess'd, And the new nuptials of the Trojan guest.
When Amata realizes that the city is under attack, she mistakenly concludes that Turnus must be dead and she kills herself.
The Latins were persuaded without much difficulty, although by that treaty Rome was the predominant State, for they saw that the heads of the Latin League were giving their adhesion to the king, and Turnus afforded a present example of the danger incurred by any one who opposed the king's wishes.