The Collaborative International Dictionary of English v.0.48:

Censer \Cen"ser\, n. [For incenser, fr. OF. encensier, F.
   encensoir, fr. LL. incensarium, incensorium, fr. L. incensum
   incense. See Incense, and cf. Incensory.]
   A vessel for perfumes; esp. one in which incense is burned.
   [1913 Webster]

   Note: The ecclesiastical censer is usually cup-shaped, has a
         cover pierced with holes, and is hung by chains. The
         censer bearer swings it to quicken the combustion.
         [1913 Webster]

               Her thoughts are like the fume of frankincense
               Which from a golden censer forth doth rise.
                                                  --Spenser.
         [1913 Webster]

WordNet (r) 3.0 (2006):

censer
    n 1: a container for burning incense (especially one that is
         swung on a chain in a religious ritual) [syn: censer,
         thurible]