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Meaning of swallow-tailed

swal•low-tailed

Pronunciation: (swol'ō-tāld"), [key]
— adj.
  1. having a deeply forked tail like that of a swallow, as various birds.
  2. having an end or part suggesting a swallow's tail.
  3. (of a flag) having a triangular indentation in the fly so as to create two tails.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.