Ma'anar ƙamus na "Bowling pin" abu ne na katako ko filastik wanda aka yi shi da siffar kwalba kuma ana amfani da shi azaman manufa a wasan ƙwallon ƙafa. Yawanci yana da kusan inci 15 tsayi kuma yana da ƙunƙuntaccen tushe wanda ke faɗaɗa sama zuwa sama, tare da saman saman lebur da ƙasa zagaye. Ana saita fil ɗin bowling a cikin tsari mai siffar triangular a ƙarshen layin wasan ƙwallon kuma an buga shi da wani nauyi mai nauyi da ɗan wasan ya birgima.