Definition of horehound bug
: a widespread orange and black Australian bug (Agonoscelis rutila) destructive to the foliage of horehound and other crop plants
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!
Seen and Heard
What made you want to look up horehound bug? Please tell us where you read or heard it (including the quote, if possible).