diameter

noun

(geometry) Any straight line between two points on the circumference of a circle that passes through the centre/center of the circle; a chord that passes through the center of the circle.

(geometry) The length of such a line.

(geometry) The maximum distance between any two points in a metric space.

(graph theory) The maximum eccentricity over all vertices in a graph.

Roots

diadia- · Greek · through, across metron-meter · Greek · measure

Synonyms for diameter

widthn radiusn lengthn dimensionsn sizen girthn heightn calibern borev measurementn

Synonyms & related words for diameter

Find synonyms, related words, and the definition of diameter — including width, radius, length, dimensions, size, girth. Dendril is a free visual thesaurus that shows them on an interactive map where stronger matches sit closer to the center — no signup, no ads.

Words related to diameter

Explore words related to diameter — words associated with it, words that go with it, and its nearest matches in meaning. Related words include circumference, diametral, centimeters, millimeters, inches, thickness, radii, diametric. Click any word to make it the center of the map and keep exploring the web of connections.

Synonyms for diameter

Common synonyms for diameter include width, radius, length, dimensions, size, girth, height, caliber — words that share a close meaning. Hover or tap any word on the map for its definition and part of speech.

Where does diameter come from?

The word diameter breaks down into 2 roots of Greek origin: dia-, from Greek dia (“through, across”); and -meter, from Greek metron (“measure”). Explore each root to see other English words built from the same source.