The Collaborative International Dictionary of English v.0.48:

Rosebush \Rose"bush`\, n.
   The bush or shrub which bears roses.
   [1913 Webster]

WordNet (r) 3.0 (2006):

rosebush
    n 1: any of many shrubs of the genus Rosa that bear roses [syn:
         rose, rosebush]

U.S. Gazetteer Places (2000):

Rosebush, MI -- U.S. village in Michigan
   Population (2000):    379
   Housing Units (2000): 156
   Land area (2000):     0.866088 sq. miles (2.243157 sq. km)
   Water area (2000):    0.000000 sq. miles (0.000000 sq. km)
   Total area (2000):    0.866088 sq. miles (2.243157 sq. km)
   FIPS code:            69640
   Located within:       Michigan (MI), FIPS 26
   Location:             43.698852 N, 84.767416 W
   ZIP Codes (1990):     48878
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Rosebush, MI
    Rosebush