Definition of troilus butterfly
: a large American swallowtail (Papilio troilus) that is black with yellow marginal spots on the front wings and blue on the rear
Start your free trial today and get unlimited access to America's largest dictionary, with:
- More than 250,000 words that aren't in our free dictionary
- Expanded definitions, etymologies, and usage notes
- Advanced search features
- Ad free!
Origin and Etymology of troilus butterfly
from Troilus, son of Priam, king of Troy, from Latin, from Greek Trōilos
Seen and Heard
What made you want to look up troilus butterfly? Please tell us where you read or heard it (including the quote, if possible).