noun Tri·onyx \ˈtrīəˌniks, trīˈän-\

Definition of Trionyx

  1. :  a genus (the type of the family Trionychidae) of softshell turtles that usually includes both Old World and New World turtles but is sometimes restricted to Old World forms

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.

Join MWU now and get access to America’s largest dictionary, with:

  • 300,000 words that aren't in our free dictionary
  • Expanded definitions, etymologies, and usage notes
  • Advanced search features
  • Ad free!

Origin and Etymology of trionyx

New Latin, from tri- + -onyx

Seen and Heard

What made you want to look up Trionyx? Please tell us where you read or heard it (including the quote, if possible).


to help become familiar with something

Get Word of the Day daily email!