Definition of alidade in English:

alidade

noun ˈalɪdeɪdˈaləˌdād

A sighting device or pointer for determining directions or measuring angles, used in surveying and (formerly) astronomy.
照准仪
Example sentencesExamples
- A wide variety of alidades and plane tables are available, both in manual and electronic versions.
- In the circle an index on the alidades gives the angle that they form with the vertical diameter.
- A pointer, called an alidade, was pivoted at the centre of the disk.
- Both the alidades and the straight edges of the quadrant are fitted with viewers.
- Telescopic alidades came into use in Europe in the early 1800s, and were soon introduced to American practice.

Origin

Late Middle English: directly or (in modern use) via French and Spanish from Arabic al-‘iḍāda 'the revolving radius', probably based on aḍud 'upper arm'.

Definition of alidade in US English:

alidade

nounˈaləˌdād

A sighting device or pointer for determining directions or measuring angles, used in surveying and (formerly) astronomy.
照准仪
Example sentencesExamples
- In the circle an index on the alidades gives the angle that they form with the vertical diameter.
- A wide variety of alidades and plane tables are available, both in manual and electronic versions.
- Both the alidades and the straight edges of the quadrant are fitted with viewers.
- A pointer, called an alidade, was pivoted at the centre of the disk.
- Telescopic alidades came into use in Europe in the early 1800s, and were soon introduced to American practice.

Origin

Late Middle English: directly or (in modern use) via French and Spanish from Arabic al-‘iḍāda ‘the revolving radius’, probably based on aḍud ‘upper arm’.

词汇	alidade
释义	Definition of alidade in English: alidade noun ˈalɪdeɪdˈaləˌdād A sighting device or pointer for determining directions or measuring angles, used in surveying and (formerly) astronomy. 照准仪 Example sentencesExamples A wide variety of alidades and plane tables are available, both in manual and electronic versions. In the circle an index on the alidades gives the angle that they form with the vertical diameter. A pointer, called an alidade, was pivoted at the centre of the disk. Both the alidades and the straight edges of the quadrant are fitted with viewers. Telescopic alidades came into use in Europe in the early 1800s, and were soon introduced to American practice. Origin Late Middle English: directly or (in modern use) via French and Spanish from Arabic al-‘iḍāda 'the revolving radius', probably based on aḍud 'upper arm'. Definition of alidade in US English: alidade nounˈaləˌdād A sighting device or pointer for determining directions or measuring angles, used in surveying and (formerly) astronomy. 照准仪 Example sentencesExamples In the circle an index on the alidades gives the angle that they form with the vertical diameter. A wide variety of alidades and plane tables are available, both in manual and electronic versions. Both the alidades and the straight edges of the quadrant are fitted with viewers. A pointer, called an alidade, was pivoted at the centre of the disk. Telescopic alidades came into use in Europe in the early 1800s, and were soon introduced to American practice. Origin Late Middle English: directly or (in modern use) via French and Spanish from Arabic al-‘iḍāda ‘the revolving radius’, probably based on aḍud ‘upper arm’.
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