Synonyms for

Diameter

Verb / daɪˈæmʌtɜ: / Another word for diameter — explore alternatives below. For syllable breakdowns and pronunciation, see this word on Syllablesworld.

Definition

The distance across a circle through its center.

Synonyms & similar words

diam width breadth span extent distance measurement dimension size scope reach spanning crossing diam caliber gauge thickness dial piston rotor

Synonyms by register

Formal

transverse cross-section

Literary

span girth

Antonyms

radius circumference perimeter width breadth chord

Common collocations

  • measure the diameter
  • calculate the diameter
  • diameter of a circle
  • inner diameter
  • outer diameter
  • nominal diameter
  • maximum diameter

Word family

noun diameter
adjective diametrical

Usage note

Diameter refers to the longest straight line passing through the center of a circle or sphere. It is often contrasted with radius, which is half the diameter.

Example sentences

  1. The diameter of the moon is about a quarter of the Earth's diameter.
  2. The diameter of the basketball hoop is 18 inches.
  3. To find the diameter of a circle, you must measure across the center of the circle.
  4. The diameter of the pizza was 12 inches.
  5. The diameter of the tire was too small for the car.

Quotes

  • The length of a man's outspread arms is equal to his height.
  • A circle is a round straight line with a hole in the middle.
  • The earth is round, and so are all the heavenly bodies.

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