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Noun tail fin has 3 senses
- vertical stabilizer, vertical stabiliser, vertical fin, tail fin, tailfin - a stabilizer that is part of the vertical tail structure of an airplane
--1 is a kind of stabilizer
--1 is a part of vertical tail
- tail fin, tailfin, fin - one of a pair of decorations projecting above the rear fenders of an automobile
--2 is a kind of decoration, ornament, ornamentation
--2 is a part of car, auto, automobile, machine, motorcar
- tail fin, caudal fin - the tail of fishes and some other aquatic vertebrates
--3 is a kind of fin
--3 is a part of fish
--3 has particulars: heterocercal fin; homocercal fin