plural noun

: a family of rather large usually black lamellicorn beetles chiefly of tropical countries that live and feed in decaying wood and are sometimes placed in the family Lucanidae see bess-bug, passalus

Word History


New Latin, from Passalus, type genus + -idae

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!

Dictionary Entries Near Passalidae

Cite this Entry

“Passalidae.” Dictionary, Merriam-Webster, Accessed 21 May. 2024.

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!