Definition

A three-dimensional shape that is formed by rotating a parabola around its axis, resulting in a surface that can be described by parabolic and elliptical sections.

Example

The satellite dish is shaped like a paraboloid to focus signals onto the receiver.

Conversation

Have you ever seen a model of a paraboloid?

No, I haven't! What does it look like?

It's really interesting; it looks like a bowl that opens up in a parabolic shape.

That sounds cool! I’d love to see one in person.

Synonyms & Antonyms

Root Explanation

Paraboloid is formed from "para-" (meaning beside or alongside) and "ballein" (Greek for to throw) combined with the suffix "-oid" (meaning resembling or having the form of). The term describes a three-dimensional shape that resembles a parabola, which is a curve that can be thought of as being 'thrown' or projected in space.

Memory Tip

Think of a shape that is 'beside' ('para-') a curve that is 'thrown' ('ballein') into three dimensions, which helps you remember that a paraboloid is a three-dimensional figure resembling a parabola.

Visually Confused Words