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 (nō′mŏn′, -mən)
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.


1. (Horology) the stationary arm that projects the shadow on a sundial
2. (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


(ˈnoʊ mɒn)

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]


, 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.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.gnomon - indicator provided by the stationary arm whose shadow indicates the time on the sundialgnomon - indicator provided by the stationary arm whose shadow indicates the time on the sundial
indicator - a device for showing the operating condition of some system
sundial - timepiece that indicates the daylight hours by the shadow that the gnomon casts on a calibrated dial
References in periodicals archive ?
Hence, the readers of Dubliners are continually spurred towards investigation, stimulated to search for the substantial evidence and visible (readable) materializations of textual ghosts or, to put it in Joyce's own images, to try to complete gnomonical forms.
The reader is changed by a discovery, by working of the gnomonical forms upon the imagination that tries to complete them, by found or conceived answers to the questions that often lead outside the text.
Minor corrections that the first researchers in the field found in Joyce' s manuscripts refer to the beforehand mentioned process of reduction and subtraction from the already written, that is, to his principle of contraction and removal of the too obvious guidelines, which resulted in the creation of enigmatic gnomonical figures that invite further interactive readings.