The scientific definition of a "machine" (derived from the Latin machina) is any device that is not a computer that transmits or modifies energy.
http://en.wikipedia.org/wiki/Machine

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noun . 1. an apparatus consisting of interrelated parts with separate functions, used in the performance of some kind of work: a sewing machine.
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Provides an interactive tool to help create reference citations for research papers. Includes various print and electronic resources.
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An overview of the six basic types of simple machines with pictures and student drawings.
http://www.coe.uh.edu/archive/science/science_lessons/scienc ...