bomba
noun
bom·ba ˈbōm-bə 
plural bombas
1
: a traditional Puerto Rican drum consisting of a barrel with a goatskin head
2
: a genre of Puerto Rican dance accompanied by drums and other percussion
also : a song sung by a soloist and chorus to accompany a bomba
Word History
Etymology
borrowed from American Spanish (Puerto Rico), probably feminine derivative of Spanish bombo "drum," derivative of the onomatopoeic base of earlier bomba "pump, bomb"
First Known Use
1951, in the meaning defined at sense 1