The Collaborative International Dictionary of English v.0.48:
Alpenstock \Al"pen*stock`\, n. [G.; Alp, gen. pl. Alpen + stock stick.] A long staff, pointed with iron, used in climbing the Alps. --Cheever. [1913 Webster]WordNet (r) 3.0 (2006):
alpenstock n 1: a stout staff with a metal point; used by mountain climbers