1. cylindrical tumblers consisting of two parts that are held in place by springs; when they are aligned with a key the bolt can be thrown; [syn: pin, pin tumbler]
WordNet (r) 3.0 (2006):
pin tumbler
n 1: cylindrical tumblers consisting of two parts that are held
in place by springs; when they are aligned with a key the
bolt can be thrown [syn: pin, pin tumbler]