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ferrule

[fer-uh l, -ool] /ˈfɛr əl, -ul/
noun
1.
a ring or cap, usually of metal, put around the end of a post, cane, or the like, to prevent splitting.
2.
a short metal sleeve for strengthening a tool handle at the end holding the tool.
3.
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, used in boilers, condensers, etc.
4.
a short ring for reinforcing or decreasing the interior diameter of the end of a tube.
5.
a short plumbing fitting, covered at its outer end and caulked or otherwise fixed to a branch from a pipe so that it can be removed to give access to the interior of the pipe.
6.
Angling.
  1. either of two fittings on the end of a section of a sectional fishing rod, one fitting serving as a plug and the other as a socket for fastening the sections together.
  2. one of two or more small rings spaced along the top of a casting rod to hold and guide the line.
verb (used with object), ferruled, ferruling.
7.
to furnish with a ferrule.
Also, ferule.
Origin
late Middle English
1605-1615
1605-15; alteration (apparently conformed to Latin ferrum iron, -ule) of verrel, verril, late Middle English virole < Middle French (cognate with Medieval Latin virola) < Latin viriola, equivalent to viri(a) bracelet + -ola -ole1
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples from the web for ferrule
  • The reuse of an existing ferrule on a newly installed service line will no longer be allowed.
  • These are some typical examples of wire snare the swivel from binding against the end ferrule made out of wire.
  • The latch ferrule in the egg trays can be easily installed by simply gluing a new one in place.
British Dictionary definitions for ferrule

ferrule

/ˈfɛruːl; -rəl/
noun
1.
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.
a side opening in a pipe that gives access for inspection or cleaning
3.
a bush, gland, small length of tube, etc, esp one used for making a joint
verb
4.
(transitive) to equip (a stick, etc) with a ferrule
Word Origin
C17: from Middle English virole, from Old French virol, from Latin viriola a little bracelet, from viria bracelet; influenced by Latin ferrum iron
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for ferrule
n.

"metal cap on a rod," 1610s, ferule, earlier verrel (early 15c.), from Old French virelle, from Latin viriola "bracelet," diminutive of viriae "bracelets," from a Gaulish word (cf. Old Irish fiar "bent, crooked"); spelling influenced by Latin ferrum "iron."

Online Etymology Dictionary, © 2010 Douglas Harper
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