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Pronunciation: (nō'mon), [key]
1. the raised part of a sundial that casts the shadow; a style. See illus. under sundial.
2. an early astronomical instrument consisting of a vertical shaft, column, or the like, for determining the altitude of the sun or the latitude of a position by measuring the length of its shadow cast at noon.
3. Geom.(formerly) the part of a parallelogram that remains after a similar parallelogram has been taken away from one of its corners.

Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.

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