A screw thread, often shortened to thread, is a helical structure used to convert between rotational and linear movement or force. A screw thread is a ridge wrapped around a cylinder or cone in the form of a helix, with the former being called a straight thread and the latter called a tapered threa...
Found on http://en.wikipedia.org/wiki/Screw_thread
[n] - the raised helical rib going around a screw
Found on http://www.webdictionary.co.uk/definition.php?query=screw%20thread
A ridge of constant section which is manufactured so that a helix is developed on the internal or external surface of a cylinder. See also: Screw, Thread.
Found on http://www.diracdelta.co.uk/science/source/s/c/screw%20thread/source.html
A ridge of constant section which is manufactured so that a helix is developed on the internal or external surface of a cylinder.
Found on http://www.boltscience.com/pages/glossary.htm
noun the raised helical rib going around a screw
Found on http://wordnetweb.princeton.edu/perl/webwn?s=screw%20thread
(from the article `screw`) ...an earlier date. The screw press, probably invented in Greece in the 1st or 2nd century , has been used since the days of the Roman Empire for ... Metal screws and nuts appeared in the 15th century. The square or hexagonal head or nut was turned with an appropriate box ...
Found on http://www.britannica.com/eb/a-z/s/50
A ridge of uniform section in the form of a helix on the external or internal surface of a cone or frustum of a cone. A thread formed on a cylinder is known as a straight or parallel thread, to distinguish it from a taper thread which is formed on a cone of frusetum of a cone.
Found on http://www.encyclo.co.uk/local/21038
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