dorsal fin

1. 1.

   unpaired median fin on the backs of fishes and some other aquatic vertebrates that help to maintain balance

   Broaderfin

Questions about dorsal fin

What does dorsal fin mean?

dorsal fin means "unpaired median fin on the backs of fishes and some other aquatic vertebrates that help to maintain balance".

Is dorsal fin a common word?

dorsal fin is banded "Rare" — specialist or archaic — most readers will not have met it. The band comes from how often the word appears in a large corpus of everyday English, not from an editor's impression.