alidade


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Related to alidade: telescopic alidade

al·i·dade

 (ăl′ĭ-dād′) also al·i·dad (-dăd′)
n.
1. An indicator or a sighting apparatus on a plane table, used in angular measurement.
2. A topographic surveying and mapping instrument used for determining directions, consisting of a telescope and attached parts.

[French, from Medieval Latin alidada, sighting rod, from Arabic al-'iḍāda, the revolving radius of a circle : al-, the + 'iḍāda, revolving radius (alternate form of 'aḍud, humerus, from 'aḍada, to lop, cut (trees); see ʕṣ́d in Semitic roots).]

alidade

(ˈælɪˌdeɪd) or

alidad

n
1. (Surveying) a surveying instrument used in plane-tabling for drawing lines of sight on a distant object and taking angular measurements
2. (Surveying) the upper rotatable part of a theodolite, including the telescope and its attachments
[C15: from French, from Medieval Latin allidada, from Arabic al-'idāda the revolving radius of a circle]

al•i•dade

(ˈæl ɪˌdeɪd)

n.
1. a straightedge with a telescopic sight, used on a plane table for topographic surveying.
2. the entire upper part of a theodolite or transit.
[1400–50; late Middle English allydatha < Old Spanish alhidada < Medieval Latin < Arabic al-‘iḍādah the turning radius (like a clock hand) of a circle]
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.alidade - surveying instrument consisting of the upper movable part of a theodolite including the telescope and its attachmentsalidade - surveying instrument consisting of the upper movable part of a theodolite including the telescope and its attachments
surveying instrument, surveyor's instrument - an instrument used by surveyors
theodolite, transit - a surveying instrument for measuring horizontal and vertical angles, consisting of a small telescope mounted on a tripod
2.alidade - surveying instrument used with a plane table for drawing lines of sight on a distant object and for measuring anglesalidade - surveying instrument used with a plane table for drawing lines of sight on a distant object and for measuring angles
surveying instrument, surveyor's instrument - an instrument used by surveyors
Translations
References in periodicals archive ?
Aledade--a play on alidade, the part of an astrolabe navigation tool that points toward the North Star--raised $4.
Of course, the plane table required an open-sight alidade and stadia rods.
An alidade is mounted in an excavated hole close to the axis and carries a chord rule jointed to its other end.
Hollows spots a potential fire he lines it up on the alidade and verifies it on a large map he can pull down from the ceiling that also contains a compass.
The pointer on the back of the mother, known as the alidade, is used as a line along which to sight celestial or terrestrial objects when making approximate measurements of their altitudes.
Ao que tudo indica, os papeis eram bem definidos em relacao a sexu alidade.
Among the common systems mentioned above, theodolite system aims at the target point through optical alidade and obtains the coordinate value by reading angle scale.
Neither in the vertical nor horizontal measuring system is the electronic parts moved relatively to the alidade, so that all electronics are fixed to it.
SPRING, Texas, April 14 /PRNewswire/ -- In his thrilling new novel Roof of Hell (published by Trafford Publishing), author Roger Alidade embarks on a life-threatening treasure hunt in the isolation of the Bering Sea and Pacific Ocean as two individuals search for answers to their personal questions of life path and history.
The mater can be suspended from a hook and its back is calibrated so that, with the aid of a sighting bar called the alidade, the altitudes of the Sun or stars can be observed.
Sill, Oklahoma, where they both trained as artillery officers, Jones just couldn't get the hang of shooting his rifle using an alidade, a telescopic site used for determining direction.
Dickmann, USN, retired (USNA; MEng, Catholic University of America), is an operations analyst for Alidade Consulting.