Definition

A tool used in surveying that includes a telescope and is part of a larger instrument, helping to measure angles and draw lines to distant objects.

Example

The surveyor used the alidad to accurately measure the angles needed for the construction project.

Conversation

Have you ever used a alidad for surveying?

No, I haven't, but I've heard they can be really useful.

Yeah, they help in measuring angles accurately.

That sounds interesting! I might need to try one out someday.

Synonyms & Antonyms

Root Explanation

The word 'alidad' originates from Arabic 'al-idād', meaning 'the direction' or 'the line'.

Memory Tip

Think of 'direction' in Arabic to remember that 'alidad' refers to a line or direction.

Visually Confused Words