dorsal fin


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Related to dorsal fin: caudal fin

dorsal fin

n.
One of one or more unpaired fins on the back of fishes and certain marine mammals.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

dorsal fin

n
(Zoology) any unpaired median fin on the backs of fishes and some other aquatic vertebrates: maintains balance during locomotion
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.dorsal fin - unpaired median fin on the backs of fishes and some other aquatic vertebrates that help to maintain balancedorsal fin - unpaired median fin on the backs of fishes and some other aquatic vertebrates that help to maintain balance
fin - organ of locomotion and balance in fishes and some other aquatic animals
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
Translations
selkäevä
nageoire dorsale
bakuggi

dorsal fin

Collins German Dictionary – Complete and Unabridged 7th Edition 2005. © William Collins Sons & Co. Ltd. 1980 © HarperCollins Publishers 1991, 1997, 1999, 2004, 2005, 2007
References in classic literature ?
Nor did he see the dorsal fin break surface and approach him from the rear.
Kidd could see the finger of the dial stand up dark against the sky like the dorsal fin of a shark and the vain moonlight clinging to that idle clock.
This same fish has the power of firmly catching hold of any object, such as the blade of an oar or the fishing- line, with the strong spine both of its pectoral and dorsal fin. In the evening the weather was quite tropical, the thermometer standing at 79 degs.
Great slate-colored backs and high serrated dorsal fins shot up with a fringe of silver, and then rolled down into the depths again.
Enolva said the 4.91-meter mammal was found at Sitio Bongsanglay in Gibraltar village with a rope around its dorsal fin and wounds on its tail, which possibly caused its death.
They were able to identify one of the dolphins, nicknamed Mischief, in the Netherlands earlier this month due to scars on its dorsal fin.
John Power, who spotted it, said: "We sighted a dorsal fin unlike anything we had encountered.
But the film appears to show some bodies with the dorsal fin removed.
"We attract the sharks using a line baited with a tuna head or a seal-shaped decoy, and then -- when a shark closes in for a look -- we use a pole to clamp the tag to the dorsal fin," Jewell explained.
Disc wider than long, margins of pectoral fins broadly rounded; anterior lobe of pelvic fins slender, pointed; tail longer than disc; snout soft, flexible, especially near tip, internal supporting rostral cartilage slender and weak; teeth small, numerous, 32 rows in upper jaw; interorbital space wide, slightly convex; thorns absent from disc; tail thorns 29, interdorsal thorns 2; dorsal and ventral surface of head and body uniformly covered with small denticles; 2 small, well-separated dorsal fins, about equal in height and length; predorsal vertebrae between pelvic girdle and origin of first dorsal fin about 86.