Definition of passalus
1 capitalized : the type genus of the family Passalidae
2 plural -es : any beetle of Passalus or a related genus; especially : a flat shiny black gregarious bess-bug (Popilius disjunctus) of the southern U.S. —called also horned passalus
Love words? You must — there are over 200,000 words in our free online dictionary, but you are looking for one that’s only in the Merriam-Webster Unabridged Dictionary.
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 passalus
New Latin, from Greek passalos peg; akin to Greek pēssein to fix, fasten, pēgnynai to fix, fasten — more at pact
Seen and Heard
What made you want to look up passalus? Please tell us where you read or heard it (including the quote, if possible).