diameter

word

Definition

The length of a straight line passing through the center of a circle or sphere, connecting two points on its edge.

Usage & Nuances

Common in math, geometry, science, and engineering. Usually paired with 'circle', 'sphere', or 'pipe'. Not to be confused with 'radius' (half the diameter). Often preceded by words like 'inner', 'outer', or specific measurements.

Example Sentences

The diameter of the circle is 10 centimeters.

basic

Measure the diameter of the pipe before buying a new one.

basic

A basketball has a larger diameter than a tennis ball.

basic

If you double the diameter of a circle, you quadruple its area.

natural

This cake pan is 20 cm in diameter, so it makes a big cake.

natural

They asked for pipes with an inner diameter of exactly two inches.

natural