The Collaborative International Dictionary of English v.0.48:

Corylopsis \Corylopsis\ n.
   small genus of deciduous shrubs of temperate regions of Asia.

   Syn: genus Corylopsis.
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

Corylopsis
    n 1: small genus of deciduous shrubs of temperate regions of
         Asia [syn: Corylopsis, genus Corylopsis]