distinguishing pennant

from The Collaborative International Dictionary of English v.0.48

Distinguishing \Dis*tin"guish*ing\, a.
   Constituting difference, or distinction from everything else;
   distinctive; peculiar; characteristic.
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         The distinguishing doctrines of our holy religion.
                                                  --Locke.
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   {Distinguishing pennant} (Naut.), a special pennant by which
      any particular vessel in a fleet is recognized and
      signaled. --Simmonds.
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