Tailfin Definition
  tailfins
  
    noun
  
 A fin at the tail (of a fish or airplane)
Wiktionary 
(automotive) A fin like projection at the rear of a car, common on American cars of the 1950s.
 Wiktionary 
Synonyms: 
  
- tail-fin
- vertical fin
- vertical stabiliser
- vertical-stabilizer
- fin
Other Word Forms of Tailfin
Noun
Singular:
 tailfinPlural:
 tailfinsTailfin Is Also Mentioned In
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