A projection downward from the keel of a yacht, resembling in shape the fin of a fish, though often with a cigar-shaped bulb of lead at the bottom, and generally made of metal. Its use is to ballast the boat and also to enable her to sail close to the wind and to make the least possible leeway by offering great resistance to lateral motion through the water.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). fin keel. Retrieved September 28, 2026, from http://smartdefine.org/fin_keel/definitions/2008033 |
| Chicago | Webster's. 2011. "fin keel" http://smartdefine.org/fin_keel/definitions/2008033 (accessed September 28, 2026). |
| Harvard | Webster's 2011, fin keel, Smart Define, viewed 28 September, 2026, <http://smartdefine.org/fin_keel/definitions/2008033>. |
| MLA | Webster's. "fin keel" 27 May 2011. Web. 28 September 2026. <http://smartdefine.org/fin_keel/definitions/2008033> |