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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.
References in periodicals archive ?
Seven gnomonic time divisions (GTD) were used to estimate the natural mortality of Panopea glohosa for specific portions of its life history: 1, egg to trochophore larvae (24 h); 2, early larvae (6.
If recognized, the presence of longitudinal folds is path gnomonic for hydrosalpinx.
A Jupiter blank, Saturn blanks, a compact gnomonic projection sky atlas (hand plotted by Tony Williams on a computer generated grid for meteor tracking) were all prepared.
2011b 'The Muhurtalaksana: A brief text on Time of Day, gnomonic shadow and divination from Java, compared to the inscriptions and the Sanskrit Atmajyotisa', in: Gyula Wojtilla and S.
In sacred geometry I think this is what is called gnomonic growth; namely, a kind of development or evolution, which unfolds through the Golden Section, and in which nothing is ever left behind but everything is always carried forward into the new.
8) "IRAC" is a gnomonic that stands for the parts of legal analysis normally expected of students on law school essay exams.
Laura Dassow Walls cites Emerson's passage on the shell in her discussion of the gnomonic in Emerson.
gnomonic projection of spherical coordinates [alpha], [delta] to the plane coordinates x', y',
Loxodromes appear as straight lines on the Mercator projection, while orthodromes appear as straight lines on the gnomonic projection (Gudmundsson and Alerstam, 1998b).