ferrule
1. fer.rule \'fer-*l\ n [alter. of ME virole, fr. MF, fr. L viriola, dim. of viria br]acelet, of Celtic origin; akin to OIr fiar oblique - more at VEER 1: a ring or cap usu. of metal put around a slender shaft (as a cane or a t ool handle) to strengthen it or prevent splitting 2: a short tube or brushing for making a tight joint (as between pipes) 2. ferrule vt : to supply with a ferrule