noun On·co·rhyn·chus \ˌäŋkōˈriŋkəs\

Definition of Oncorhynchus

  1. :  a genus of salmons that are related to those of the genus Salmo but have a greater number of anal rays, branchiostegals, pyloric caeca, and gill rakers and that include commercially important fishes of the north Pacific and of the coastal streams of both America and Asia

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 oncorhynchus

New Latin, from onc- + -rhynchus

Seen and Heard

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


feeling or affected by lethargy

Get Word of the Day daily email!