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gnomonic

[noh-mon-ik]

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adjective

of or relating to a gnomon or to a sundial.

of or relating to the measurement of time by a gnomon or a sundial.

of, relating to, or noting a map projection in which all great circles are depicted as straight lines: a gnomonic chart.

Sometimes gno·mon·i·cal [noh-mon-i-kuh l] /noʊˈmɒn ɪ kəl/.

Origin of gnomonic

1595–1605; < Latin gnōmonicus “of, belonging to a gnomon” < Greek gnōmonikós. See gnomon, -ic

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for gnomonic

Historical Examples of gnomonic

Another kind of projection in common use is the “gnomonic projection” (fig. 12).
Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 7
Various
Gnomonic and conical projections are also used for the polar charts, differing little from the foregoing for moderate areas.
Nautical Charts
G. R. Putnam
A modified or composite course can readily be laid out on a gnomonic chart.
Nautical Charts
G. R. Putnam
The distortion, however, is necessarily enormous when the celestial sphere is presented in only six gnomonic maps.
Half-hours with the Telescope
Richard A. Proctor