Definition

A straight line or fixed curve that helps define the shape of certain geometric figures, especially in mathematics, such as conic sections.

Example

In geometry, the directrix is used to help describe the properties of parabolas and other conic sections.

Conversation

Have you ever heard about the concept of directrix in math?

Yeah, I think it has something to do with conic sections, right?

Exactly! It's the line that helps define the shape of the curve.

That makes sense! Math can be pretty fascinating sometimes.

Synonyms & Antonyms

Root Explanation

Directrix → It is formed from "directus" (meaning straight or guided) and the suffix "-rix" (a feminine agent suffix in Latin). The word "directrix" refers to a guiding line or curve, particularly in geometry, indicating a straight path or direction.

Memory Tip

Think of 'straight' or 'guided' ('directus') to remember that a 'directrix' is a guiding line in geometry.

Visually Confused Words