thumb piano
noun [ C ] uk/ˌθʌm piˈæn.əʊ/ us/ˈθʌm piˌæn.oʊ/ (also mbira)
拇指钢琴（一种非洲乐器）
an African musical instrument consisting of a board with metal strips attached to it, that you play by plucking (= pushing or pulling then releasing) the strips with your thumbs