Definify.com
Webster 1913 Edition
Ferrule
Fer′rule
(fĕr′rĭl or fĕr′rụl; 277)
, Noun.
[Formerly
verrel
, F. virole
, fr. L. viriola
little bracelet, dim. of viriae
, pl., bracelets; prob. akin to viere
to twist, weave, and E. withe
. The spelling with f is due to confusion with L. ferrum
iron.] [Sometimes spelled
ferule
.] 1.
A ring or cap of metal put round a cane, tool, handle, or other similar object, to strengthen it, or prevent splitting and wearing.
3.
Hence:
(Steam Boilers)
A bushing for expanding the end of a flue to fasten it tightly in the tube plate, or for partly filling up its mouth.
Webster 1828 Edition
Ferrule
FER'RULE
,Noun.
A ring of metal put round a cane or other thing to strengthen it.