gnomon

gnomon

gno·mon

G0166900 (nō′mŏn′, -mən)n.1. An object, such as the style of a sundial, that projects a shadow used as an indicator.2. The geometric figure that remains after a parallelogram has been removed from a similar but larger parallelogram with which it shares a corner.

[Latin gnōmōn, from Greek, interpreter, pointer of a sundial, from gignōskein, to know; see gnō- in Indo-European roots.]

gno·mon′ic, gno·mon′i·cal adj.

gnomon

(ˈnəʊmɒn) n1. (Horology) the stationary arm that projects the shadow on a sundial2. (Mathematics) a geometric figure remaining after a parallelogram has been removed from one corner of a larger parallelogram[C16: from Latin, from Greek: interpreter, from gignōskein to know] gnoˈmonic, gnoˈmonical adj gnoˈmonically adv

gno•mon

(ˈnoʊ mɒn)

n. 1. the raised part of a sundial that casts the shadow; a style. 2. the part of a parallelogram that remains after a similar parallelogram has been taken away from one of its corners. [1540–50; < Latin gnōmōn pin of a sundial < Greek gnṓmōn literally, interpreter, discerner]

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.

Thesaurus

Noun

gnomon - indicator provided by the stationary arm whose shadow indicates the time on the sundialindicator - a device for showing the operating condition of some systemsundial - timepiece that indicates the daylight hours by the shadow that the gnomon casts on a calibrated dial

gnomon

(nō`mŏn): see sundialsundial,
instrument that indicates the time of day by the shadow, cast on a surface marked to show hours or fractions of hours, of an object on which the sun's rays fall.
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gnomon

(noh -mon) A device used in ancient times to measure the altitude of the Sun and hence to determine the time of day and time of year. It consisted of a vertical shaft of known height (such as an upright rod or pillar) that cast a shadow of measurable length and direction on a graduated horizontal base. The ratio of height to shadow length gave the tangent of the altitude angle. The term is also applied to the metal projection on a sundial, used for the same purpose.

Gnomon

an ancient astronomical instrument consisting of a vertical column on a horizontal platform. The altitude and azimuth of the sun can be determined from the length and direction of the column’s shadow. The shortest shadow during the day indicates the direction of the north line. In ancient times the gnomon was used to determine the inclination of the ecliptic to the equator and the geographical latitude of locations. In modern times the gnomon finds use only as a sundial.

gnomon

[′nō·mən] (engineering) On a sundial, the inclined plate or pin that casts a shadow. Also known as style. (mathematics) A geometric figure formed by removing from a parallelogram a similar parallelogram that contains one of its corners.

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Words related to gnomon

noun indicator provided by the stationary arm whose shadow indicates the time on the sundial

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