alidad

Noun alidad has 2 senses

• alidad(n = noun.artifact) alidade - surveying instrument consisting of the upper movable part of a theodolite including the telescope and its attachments;
is a kind of surveying instrument, surveyor's instrument
is a part of theodolite, transit

• alidad(n = noun.artifact) alidade - surveying instrument used with a plane table for drawing lines of sight on a distant object and for measuring angles;
is a kind of surveying instrument, surveyor's instrument