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Definition of harbor porpoise
harbor porpoise
(UK: harbour porpoise)
Plural:harbor porpoises
• noun
1
American A small, robust marine mammal of the toothed whale family (Phocoena phocoena) that inhabits the cold temperate and subarctic coastal waters of the Northern Hemisphere, easily recognized by its short, blunt snout and dark gray back.
Example
"During the ferry crossing, the marine biologist pointed out a small pod of harbor porpoises surfacing quickly for air."
Word Nuance & Usage
The spelling 'harbor porpoise' is used in American English, whereas 'harbour porpoise' is the standard spelling in British and Commonwealth English.
• Nearby Words
Usage Trend
Historical frequency of usage in published text.
180019102020
Data source: Google Books Ngram Viewer
Cite this Entry
Wordmom. (2026). Definition of Harbor porpoise. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/harbor-porpoise