noun ·Rare ·Advanced level

Definitions

Noun

1. 1
   A saillike dorsal fin.
2. 2
   Any organism having such a fin, such as a mollie (Poecilia latipinna) or a lizard of the genus Hydrosaurus.

Etymology

From sail + fin.

Related phrases

sailfin cardinalfishsailfin dragonsailfin lizardsailfin sandfishdorsal fin

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.