1The projecting piece on a sundial that shows the time by the position of its shadow.
- The problem is that the gardeners have been caught on the gnomon of their own sundial.
- He also probably introduced the gnomon (a perpendicular sun-dial) into Greece and erected one in Sparta.
- He placed a pole perfectly upright in the ground to make a simple sundial, or gnomon.
2 Geometry The part of a parallelogram left when a similar parallelogram has been taken from its corner.
- Revolve the gnomon about its vertex and it can draw a circle; combine two gnomons and they form a square.
- When the gnomon is turned up, it can measure height; when it is turned over, it can measure depth and when it lies horizontally it can measure distance.
- Example sentences
- Loxodromes appear as straight lines on the Mercator projection, while orthodromes appear as straight lines on the gnomonic projection.
- The videos were projected onto two screens built to replicate the gnomonic and ‘Robinson projections’ of representing the globe on a two dimensional surface.
- A gnomonic image, meanwhile, tends to make the surface appear flat, and is used by navigators and aviators in determining the shortest distance between two points.
Mid 16th century: via Latin from Greek gnōmōn 'indicator, carpenter's square' (related to gignōskein 'know').
Words that rhyme with gnomonJomon
What do you find interesting about this word or phrase?
Comments that don't adhere to our Community Guidelines may be moderated or removed.