Definition

A tool used in surveying and mapping that helps to find directions. It usually has a telescope and other parts attached to it.

Example

The surveyor used an alidade to accurately measure the angles on the map.

Conversation

Have you ever used an alidade for surveying?

No, I haven't! What exactly is it used for?

It's a tool that helps determine directions while mapping areas.

That sounds really useful, especially for outdoor projects!

Synonyms & Antonyms

Root Explanation

Alidade comes from the Arabic word 'al-‘idā' (meaning the instrument for sighting) combined with the Latin suffix '-ade' (indicating a tool or instrument). The word refers to a tool used for sighting or measuring angles in surveying and navigation.

Memory Tip

Imagine an instrument that helps you 'sight' or 'measure' angles — that's what an alidade is, derived from the Arabic term for a sighting tool.

Visually Confused Words