thimble

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thimble

1. any small metal cap resembling this
2. Nautical a loop of metal having a groove at its outer edge for a rope or cable, for lining the inside of an eye

thimble

[′thim·bəl]
(computer science)
A cone-shaped, rotating printing element on an impact printer having character slugs around the perimeter and a hammer that drives the appropriate slug forward to print the impression on paper.

thimble

thimble, 1
1. A protective sleeve of metal which passes through the wall of a chimney to hold the end of a stovepipe or smoke pipe.
2. The socket or bearing attached to an escutcheon plate in which the end of the knob shank rotates.