- the raised part of a sundial that casts the shadow; a style.
- an early astronomical instrument consisting of a vertical shaft, column, or the like, for determining the altitude of the sun or the latitude of a position by measuring the length of its shadow cast at noon.
- Geometry. (formerly) the part of a parallelogram that remains after a similar parallelogram has been taken away from one of its corners.
Origin of gnomon
Related Words for gnomondial, clock, watch, chronometer, calendar, chronograph, repeater, metronome, pendulum, horologe, chronoscope, gnomon, sundial, stopwatch, clepsydra, hourglass, time-keeper
Examples from the Web for gnomon
Historical Examples of gnomon
No doubt, however, it was a sun-dial, or gnomon of some kind.The Story of Eclipses
The Gnomon is any one of the Diagonall with the two complements.
There is therefore in every Parallelogramme a double Gnomon; as in these two examples.
But I landed in the dark chamber of a Gnomon, waist-deep in loose wheat.
I mounted the only unsealed Gnomon and shouted down into its cavernous depths.
- the stationary arm that projects the shadow on a sundial
- a geometric figure remaining after a parallelogram has been removed from one corner of a larger parallelogram
Word Origin for gnomon
"vertical shaft that tells time by the shadow it casts" (especially the triangular plate on a sundial), 1540s, from Latin gnomon, from Greek gnomon "indicator," literally "one who discerns," from gignoskein "to come to know" (see gnostic (adj.)).