Source : Webster's Revised Unabridged Dictionary (1913)

Tintinnabulum \Tin`tin*nab"u*lum\, n.; pl. {Tintinnabula}. [L.,
   a bell. See {Tintinnabular}.]
   A bell; also, a set or combination of bells or metal plates
   used as a musical instrument or as a toy.

Source : WordNet®

tintinnabula
     See {tintinnabulum}