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GNOMON Definition & Meaning | Dictionary.com

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View synonyms for gnomon

gnomon

[ noh-mon ]

noun

  1. the raised part of a sundial that casts the shadow; a style.
  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. Geometry. (formerly) the part of a parallelogram that remains after a similar parallelogram has been taken away from one of its corners.


gnomon

/ ˈnəʊmɒn /

noun

  1. the stationary arm that projects the shadow on a sundial
  2. a geometric figure remaining after a parallelogram has been removed from one corner of a larger parallelogram
“Collins English Dictionary — Complete & Unabridged” 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Derived Forms

  • gnoˈmonically, adverb
  • gnoˈmonic, adjective
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Word History and Origins

Origin of gnomon1

1540–50; < Latin gnōmōn pin of a sundial < Greek gnṓmōn literally, interpreter, discerner
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Word History and Origins

Origin of gnomon1

C16: from Latin, from Greek: interpreter, from gignōskein to know
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Example Sentences

As visitors hover over the work, functioning as a vertical gnomon, their shadows fall onto one of the panels, depending on the time of day.

The pole serves as a gnomon, the part of a sundial that casts a shadow to denote time.

A sundial uses a shadow cast by a thin rod called a gnomon on to a flat surface etched with different times.

From BBC

A gnomon is the perpendicular part of a sundial, the part that casts a shadow.

Pytheas of Marseilles—who lived in the time of Alexander the Great, about 330 B.C.—measured the latitude of Marseilles by means of a gnomon, and found it to be about 42° 56′½.

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