noun \ˈa-lə-ˌdād\

Definition of ALIDADE

:  a rule equipped with simple or telescopic sights and used for determination of direction: as
a :  a part of an astrolabe
b :  a part of a surveying instrument consisting of the telescope and its attachments

Origin of ALIDADE

Middle English allidatha, from Medieval Latin alhidada, from Arabic al-ʽiḍāda the revolving radius of a circle
First Known Use: 15th century


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