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1. A metal ring or cap placed around a pole or shaft for reinforcement or to prevent splitting.
2. A bushing used to secure a pipe joint.
[Alteration (influenced by Latin ferrum, iron) of Middle English verrele, from Old French virole, from Latin viriola, little bracelet, diminutive of viriae, bracelets; see wei- in the Appendix of Indo-European roots.]
ferrule(ˈfɛruːl; -rəl) or
1. (Mechanical Engineering) a metal ring, tube, or cap placed over the end of a stick, handle, or post for added strength or stability or to increase wear
2. (Mechanical Engineering) a side opening in a pipe that gives access for inspection or cleaning
3. (Mechanical Engineering) a bush, gland, small length of tube, etc, esp one used for making a joint
(Mechanical Engineering) (tr) to equip (a stick, etc) with a ferrule
[C17: from Middle English virole, from Old French virol, from Latin viriola a little bracelet, from viria bracelet; influenced by Latin ferrum iron]
fer•rule(ˈfɛr əl, -ul)
1. a ring, cap, or sleeve, usu. of metal, put around the end of a post, cane, tool, or the like, to prevent splitting.
2. a bushing or adapter holding the end of a tube and inserted into a hole in a plate in order to make a tight fit.
[1605–15; alter. of verrel, verril, late Middle English virole < Middle French < Latin viriola=viri(a) bracelet + -ola -ole1]
Past participle: ferruled