Definition:Neusis Ruler

Definition

A neusis ruler is a straightedge on which two points have been marked with a specific fixed length between them.

Diastema

On a neusis ruler, the diastema is the specific fixed length between the two marked points.

Also known as

The word neusis can also be seen as neuseis.

See the linguistic note.

Also see

• Definition:Neusis Construction

Linguistic Note

The word neusis is the Greek νεῦσις, which comes from the word νεύειν (neuein) meaning incline towards.

Its plural is νεύσεις (neuseis).

Sources

• 2008: Ian Stewart: Taming the Infinite ... (previous) ... (next): Chapter $2$: The Logic of Shape: Problems for the Greeks