Definition of gnomon in English:

gnomon

noun ˈnəʊmɒnˈnoʊmən

1The projecting piece on a sundial that shows the time by the position of its shadow.
（日晷的）指时针（通过其影子的位置来显示时间）
Example sentencesExamples
- He also probably introduced the gnomon (a perpendicular sun-dial) into Greece and erected one in Sparta.
- To ensure that the sundial registered roughly the correct time all the year round the gnomon had to be set at exactly the correct angle.
- The problem is that the gardeners have been caught on the gnomon of their own sundial.
- He placed a pole perfectly upright in the ground to make a simple sundial, or gnomon.
1. 1.1Astronomy A structure, especially a column, used in observing the sun's meridian altitude.
  〔天文〕圭表, 日圭
  Example sentencesExamples
  It is an astronomy text, showing how to measure the positions of the heavenly bodies using shadow gauges which are also called gnomons, but it contains important sections on mathematics.
  Pergolas, open steel stairs, lattices and wooden blinds all act as shadow-casters and gnomons.
  The simplest astronomical instruments was the gnomon, nothing other than a stick which was erected and the length of its shadow measured.
  The text measures the positions of the heavenly bodies using shadow gauges which are also called gnomons.
  He is also said to have constructed a armillary sphere, a water clock, and a bronze gnomon, a pointer whose shadow gives the time of mid-day.
2Geometry
The part of a parallelogram left when a similar parallelogram has been taken from its corner.
〔几何〕磬折形
Example sentencesExamples
- 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.

Derivatives

gnomonic

adjective nəʊˈmɒnɪknoʊˈmɑnɪk

It failed to use gnomonic charts for its bearings and the King George V was given the position of the Bismarck but it was 200 miles out.
Example sentencesExamples
- 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.
- Loxodromes appear as straight lines on the Mercator projection, while orthodromes appear as straight lines on the gnomonic projection.
- On the gnomonic projection, the landing site is approaching and the surface features become sharper.

Origin

Mid 16th century: via Latin from Greek gnōmōn 'indicator, carpenter's square' (related to gignōskein 'know').

Rhymes

Jomon

Definition of gnomon in US English:

gnomon

nounˈnoʊmənˈnōmən

1The projecting piece on a sundial that shows the time by the position of its shadow.
（日晷的）指时针（通过其影子的位置来显示时间）
Example sentencesExamples
- The problem is that the gardeners have been caught on the gnomon of their own sundial.
- To ensure that the sundial registered roughly the correct time all the year round the gnomon had to be set at exactly the correct angle.
- He placed a pole perfectly upright in the ground to make a simple sundial, or gnomon.
- He also probably introduced the gnomon (a perpendicular sun-dial) into Greece and erected one in Sparta.
2Geometry
The part of a parallelogram left when a similar parallelogram has been taken from its corner.
〔几何〕磬折形
Example sentencesExamples
- 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.

Origin

Mid 16th century: via Latin from Greek gnōmōn ‘indicator, carpenter's square’ (related to gignōskein ‘know’).

单词	gnomon
释义	Definition of gnomon in English: gnomon noun ˈnəʊmɒnˈnoʊmən 1The projecting piece on a sundial that shows the time by the position of its shadow. （日晷的）指时针（通过其影子的位置来显示时间） Example sentencesExamples He also probably introduced the gnomon (a perpendicular sun-dial) into Greece and erected one in Sparta. To ensure that the sundial registered roughly the correct time all the year round the gnomon had to be set at exactly the correct angle. The problem is that the gardeners have been caught on the gnomon of their own sundial. He placed a pole perfectly upright in the ground to make a simple sundial, or gnomon. 1.1Astronomy A structure, especially a column, used in observing the sun's meridian altitude. 〔天文〕圭表, 日圭 Example sentencesExamples It is an astronomy text, showing how to measure the positions of the heavenly bodies using shadow gauges which are also called gnomons, but it contains important sections on mathematics. Pergolas, open steel stairs, lattices and wooden blinds all act as shadow-casters and gnomons. The simplest astronomical instruments was the gnomon, nothing other than a stick which was erected and the length of its shadow measured. The text measures the positions of the heavenly bodies using shadow gauges which are also called gnomons. He is also said to have constructed a armillary sphere, a water clock, and a bronze gnomon, a pointer whose shadow gives the time of mid-day. 2Geometry The part of a parallelogram left when a similar parallelogram has been taken from its corner. 〔几何〕磬折形 Example sentencesExamples 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. Derivatives gnomonic adjective nəʊˈmɒnɪknoʊˈmɑnɪk It failed to use gnomonic charts for its bearings and the King George V was given the position of the Bismarck but it was 200 miles out. Example sentencesExamples 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. Loxodromes appear as straight lines on the Mercator projection, while orthodromes appear as straight lines on the gnomonic projection. On the gnomonic projection, the landing site is approaching and the surface features become sharper. Origin Mid 16th century: via Latin from Greek gnōmōn 'indicator, carpenter's square' (related to gignōskein 'know'). Rhymes Jomon Definition of gnomon in US English: gnomon nounˈnoʊmənˈnōmən 1The projecting piece on a sundial that shows the time by the position of its shadow. （日晷的）指时针（通过其影子的位置来显示时间） Example sentencesExamples The problem is that the gardeners have been caught on the gnomon of their own sundial. To ensure that the sundial registered roughly the correct time all the year round the gnomon had to be set at exactly the correct angle. He placed a pole perfectly upright in the ground to make a simple sundial, or gnomon. He also probably introduced the gnomon (a perpendicular sun-dial) into Greece and erected one in Sparta. 2Geometry The part of a parallelogram left when a similar parallelogram has been taken from its corner. 〔几何〕磬折形 Example sentencesExamples 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. Origin Mid 16th century: via Latin from Greek gnōmōn ‘indicator, carpenter's square’ (related to gignōskein ‘know’).
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