noun
: a block of steel used in watchmaking that is pierced with holes for the reception of arbors so that the pinion or collet to be riveted finds a resting place round the edge of a suitable hole
noun
: a block of steel used in watchmaking that is pierced with holes for the reception of arbors so that the pinion or collet to be riveted finds a resting place round the edge of a suitable hole
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012