The Collaborative International Dictionary of English v.0.48:

Astrophyton \As*troph"y*ton\, n. [Astro- + Gr. fyton a plant.]
   (Zool.)
   A genus of ophiurans having the arms much branched.
   [1913 Webster]

WordNet (r) 3.0 (2006):

Astrophyton
    n 1: includes many of the basket stars [syn: Astrophyton,
         genus Astrophyton]