The Collaborative International Dictionary of English v.0.48:

Tympano \Tym"pa*no\, n.; pl. Tympani. [It. timpano. See
   Tympanum.] (Mus.)
   A kettledrum; -- chiefly used in the plural to denote the
   kettledrums of an orchestra. See Kettledrum. [Written also
   timpano.]
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Tympano- \Tym"pa*no-\
   A combining form used in anatomy to indicate connection with,
   or relation to, the tympanum; as in tympanohyal,
   tympano-Eustachian.
   [1913 Webster]