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The Collaborative International Dictionary of English v.0.48 (gcide)

Thimble \Thim"ble\, n. [OE. thimbil, AS. ??mel, fr. ??ma a
thumb. [root]56. See {Thumb}.]
1. A kind of cap or cover, or sometimes a broad ring, for the
end of the finger, used in sewing to protect the finger
when pushing the needle through the material. It is
usually made of metal, and has upon the outer surface
numerous small pits to catch the head of the needle.
[1913 Webster]

2. (Mech.) Any thimble-shaped appendage or fixure.
Specifically:
(a) A tubular piece, generally a strut, through which a
bolt or pin passes.
(b) A fixed or movable ring, tube, or lining placed in a
hole.
(c) A tubular cone for expanding a flue; -- called
{ferrule} in England.
[1913 Webster]

3. (Naut.) A ring of thin metal formed with a grooved
circumference so as to fit within an eye-spice, or the
like, and protect it from chafing.
[1913 Webster]


Bushing \Bush"ing\, n. [See 4th {Bush}.]
1. The operation of fitting bushes, or linings, into holes or
places where wear is to be received, or friction
diminished, as pivot holes, etc.
[1913 Webster]

2. (Mech.) A bush or lining; -- sometimes called a {thimble}.
See 4th {Bush}.
[1913 Webster]