The Collaborative International Dictionary of English v.0.48:

Recurved \Re*curved"\ (r?*k?rvd"), a.
   Curved in an opposite or uncommon direction; bent back; as, a
   bird with a recurved bill; flowers with recurved petals.
   [1913 Webster]

WordNet (r) 3.0 (2006):

recurved
    adj 1: curved backward or inward [syn: recurved, recurvate]