ventral fin
noun
Definition of ventral fin
1a : either of the pair of fins of a fish that correspond to the hind limbs of quadrupeds : pelvic fin b : anal fin
2 : a fixed stabilizing surface attached to the rear undersurface of an airplane
Explore M-W
There's more!
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!
Seen and Heard
What made you want to look up ventral fin? Please tell us where you read or heard it (including the quote, if possible).
Writing? Check your grammar now!