1. A straight line passing through the centre of a circle from circumference to circumference, and dividing it into two equal parts; the length of a right line passing through the centre of an object, from one side to the other.

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• diaster,
• diametre,
• diamator,
• diamater,
• diasater,
• diamerter,
• diabete,
• dieameter,
• diamtere,
• diametar,
• diamters,
• diamteter,
• diamitor,
• diamiter,
• diamter,
• diametr,
• dimeter,
• diameer,
• daimeter,
• dimater

• diametrical,
• diametral,
• Dimitri,
• demeter,
• Dieter,
• diametric,
• dimetrodon.

The adjective form of the word "diameter" is "diametral".

The plural of the "diameter" can be the "diameters".

The singular of the "diameter" can be the "diameter".