The Collaborative International Dictionary of English v.0.48:
Leister \Leis"ter\, Lister \Lis"ter\(l[i^]s"t[~e]r), n. A spear armed with three or more prongs, for striking fish. [Scotland] [1913 Webster]WordNet (r) 3.0 (2006):
leister n 1: a spear with three or more prongs; used for spearing fish (especially salmon)