gnomon

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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.
References in periodicals archive ?
An Indian circle is a circle drawn on the ground, of an arbitrary radius, at the center of which a gnomon is installed.
Zum antiken astro-geodatischen Messinstrument Skiotherikos Gnomon," Zeitschrift far Vermessungswesen 130.
We'll need to do some counting similarly to the triangular numbers but with a pentagonal grid of dots and develop a table of values that correspond to each "level" of number similar to the last edition of Diversions and identify the gnomon sequence.
In the Square, successive gnomons were 3, 5, 7, 9, 11, 13, 15.
Explanation could refer to differences increasing by one each time so the gnomons are the counting numbers 2, 3, 4, 5, 6, 7, 8 (revisiting this next issue).
since Pythagoras is credited with initiating them, and the notion that these numbers are generated from a gnomon or basic unit.
Thanks to the expertise of our partners at Gnomon School of Visual Effects, the Stan Winston School will be at the vanguard of visual arts education.
Featuring many of the film industry's leading character and creature artists, including Gnomon founder Alex Alvarez, The Winston Effect panel will also include messages about the Stan Winston School of Character Arts from James Cameron and Tim Burton.
While Gnomon students participate in group projects through their lab work, those projects don't necessarily reflect the real-world structure and workflow of a visual effects studio," said Alex Alvarez, founder and director of Gnomon School of Visual Effects.
Class of 2010 Gnomon graduate John Patrick worked on Gnomon Studios projects while the facility was being established, and has just been hired by Sony Pictures Imageworks as a Pipeline Technical Director.
The Gnomon School has long been recognized as a leading institution for advanced training within the digital entertainment industry, and we are now proud to expand access to Gnomon though the new Entertainment Design and Digital Production program," said Alex Alvarez, Founder of Gnomon School of Visual Effects.
In addition, Gnomon uniquely provides an advanced learning experience with classes taught by leading visual effects artists that specialize in each field of study.