pin(redirected from friction-retained pin)
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pin.One of the earliest human artifacts, pins were at first made of thorns, bone, or wood and were used as clothing fasteners, hairpins, and meat skewers. These long, single-shaft pins were early imitated in metal and were often tipped with ornamental knobs. The fibulae, prototype of the safety pin and probably one of the earliest applications of the spring coil, was popular from early antiquity through medieval times. It was the forerunner of the modern brooch through the hinged pin, which was developed by the Romans. Bent-wire hairpins are believed to have originated in England in the 16th cent.; the modern bobby pin was introduced in the 20th cent. In the 14th and 15th cent. in England the costliness and scarcity of plain pins caused Parliament to limit their sale to the first two days of January, for which women saved money all year—hence the term "pin money." In the 19th cent., with the fashion for enormous hats came the development of ornate jeweled hatpins.
a cylindrical or tapered rod that is used to join parts together, often in a precisely determined position, or to transfer relatively small loads. Pins are employed in fixed joints. In order to insert a pin, the parts are joined together and secured. A hole is then drilled and reamed at the location in the parts where the pin is to be inserted. In contrast to a cylindrical pin, a taper pin may be used repeatedly without reducing the precision with which the parts are positioned.
What does it mean when you dream about a pin?
A pin might have several meanings. Pins are small tools that help us sew something together, so perhaps we are dreaming about knitting something together. Pins can also hold a notice to a bulletin board, so perhaps the dream is trying to call our attention to something. We sometimes talk about “pinning blame” or “pinning on hopes” on someone. We can also “pin something down” or “walk on pins and needles.”
pin(1) The male lead on a chip or cable connector. Each pin is plugged into its female counterpart to complete the circuit. The number of pins reflects the number of wires, or pathways, that carry signals. See plugs and sockets.
(2) (PIN) (Personal Identification Number) A type of password used for authentication. Typically four to six digits, the PIN is used to authenticate ATM and debit cards. The PIN may be the only authentication mechanism required, or it may be used with another password. See passcode and password.
(3) To place an object onto a home screen or home page. For example, in Windows and Windows Phone, "Pin to Start" means to place an application icon onto the Start screen. See Pinterest.
(4) (PIN) (Processor Independent NetWare) A version of NetWare 4.1 designed for portability to multiple platforms. Development was stopped in early 1995.