Also found in: Thesaurus, Encyclopedia, Wikipedia.
al·i·dade(ăl′ĭ-dād′) also al·i·dad (-dăd′)
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.
Switch to new thesaurus
|Noun||1.||alidad - surveying instrument consisting of the upper movable part of a theodolite including the telescope and its attachments|
|2.||alidad - surveying instrument used with a plane table for drawing lines of sight on a distant object and for measuring angles|