Gnomonics - definition of gnomonics by The Free Dictionary
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gnomon, gnomonics - A gnomon is the pillar or rod that casts a shadow on a sundial; gnomonics is the art or science of dialing or of constructing dials to show the hour of the day by the shadow of a gnomon.
See also related terms for pillar
the art or science of constructing dials, as sundials, which show the time of day by the shadow of the gnomon, a pin or triangle raised above the surface of the dial.See also: Time