Definition of Dall porpoise
: a common porpoise (Phocoenoides dalli) of the coastal waters of western North America that reaches a length of six feet and is black above with much white on the sides and ventral surface
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 dall porpoise
after William H. Dall †1927 American naturalist
First Known Use: 1951
Seen and Heard
What made you want to look up Dall porpoise? Please tell us where you read or heard it (including the quote, if possible).