The Collaborative International Dictionary of English v.0.48:

broadtail \broadtail\ n.
   1. the fur of a very young karakul lamb.
      [WordNet 1.5]

   2. a hardy coarse-haired sheep of central Asia; the lambs are
      valued for their soft curly black fur.

   Syn: caracul, karakul.
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

broadtail
    n 1: the fur of a very young karakul lamb
    2: hardy coarse-haired sheep of central Asia; lambs are valued
       for their soft curly black fur [syn: broadtail, caracul,
       karakul]