Timpani :  (noun)

1: a large hemispherical brass or copper percussion instrument with a drumhead that can be tuned by adjusting the tension on it [syn: kettle, kettledrum, tympanum, tympani]

bongo drum, conga, drum, drumhead, drumskin, drumstick, jazz stick, kettle, kettledrum, membranophone, side drum, snare, snare drum, tabor, taboret, tabret, tam-tam, tambourine, tenor drum, timbrel, tom-tom, troll-drum, tymp stick, tympan, tympanon, tympanum, war drum,