Source : Webster's Revised Unabridged Dictionary (1913)

Bristletail \Bris"tle*tail`\, n. (Zo["o]l.)
   An insect of the genera {Lepisma}, {Campodea}, etc.,
   belonging to the Thysanura.

Source : WordNet®

bristletail
     n : small wingless insect with a long bristlelike tail