The Collaborative International Dictionary of English v.0.48:
ninepin \ninepin\ n. a bowling pin of the type used in ninepins (or (in England) skittles). Syn: skittle, skittle pin. [WordNet 1.5]WordNet (r) 3.0 (2006):
ninepin n 1: a bowling pin of the type used in playing ninepins or (in England) skittles [syn: ninepin, skittle, skittle pin]