grommet

[grom-it]
noun
1.
Machinery.
a.
any of various rings or eyelets of metal or the like.
b.
an insulated washer of rubber or plastic, inserted in a hole in a metal part to prevent grounding of a wire passing through the hole.
2.
Nautical.
a.
a ring or strop of fiber or wire; becket.
b.
a ring having a thickness of three strands, made by forming a loop of a single strand, then laying the ends around the loop.
c.
a ring of fiber used as a seal or gasket, as under the head of a bolt.
3.
a washer or packing for sealing joints between sections of pipe.
4.
Military. a stiff ring of rubber or metal inside the top of a service cap, designed to keep the top of the cap stretched flat.
5.
a metal-bound eyelet in cloth, sometimes used decoratively, as on a garment.
verb (used with object)
6.
to fasten with a grommet.
Also, grummet.


Origin:
1620–30; < obsolete French gromette curb of bridle < ?

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World English Dictionary
grommet or grummet (ˈɡrɒmɪt)
 
n
1.  a ring of rubber or plastic or a metal eyelet designed to line a hole to prevent a cable or pipe passed through it from chafing
2.  a ring of rope hemp used to stuff the gland of a pipe joint
3.  med a small tube inserted into the eardrum in cases of glue ear in order to allow air to enter the middle ear
4.  informal (Austral) a young or inexperienced surfer
 
[C15: from obsolete French gourmette chain linking the ends of a bit, from gourmer bridle, of unknown origin]
 
grummet or grummet
 
n
 
[C15: from obsolete French gourmette chain linking the ends of a bit, from gourmer bridle, of unknown origin]

Collins English Dictionary - Complete & Unabridged 10th Edition
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Etymonline
Word Origin & History

grommet
1626, "ring or wreath of rope," from Fr. gromette "curb of a bridle," from gourmer "to curb," of uncertain origin. Extended sense of "metal eyelet" first recorded 1769.
Online Etymology Dictionary, © 2010 Douglas Harper
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Example sentences
Hanger rod shall be separated from contact with hanger bracket by a neoprene grommet.
Grommet size shall be one half inch and shall be manufactured of stainless steel.
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