Japanese word

直径

Pronunciation

Romajichokkei

Meaning

  • noundiameter

Example

この円の直径は十センチです。ko no en no chok kei wa jū se n chi de su

The diameter of this circle is ten centimeters.

Illustration for 直径 (diameter)

More examples

二つの円は直径が同じです。futa tsu no en wa chok kei ga ona ji de su

The two circles have the same diameter.

Core concept

It marks the full distance from one edge of a circle to the opposite edge through the center.

Common phrases

  • 直径を測るchok kei o haka ru

    measure the diameter

  • 直径を求めるchok kei o moto me ru

    calculate the diameter

Similar words

径kei: A diameter expressed in technical language or compound words.
差し渡しsashiwatashi: The distance measured directly across an object between opposite sides.

Definition in Japanese

円の中心を通り、円周上の二点を結ぶ線分の長さ。en no chū shin o tō ri en shū jō no ni ten o musu bu sen bun no naga sa

Word origin

The Sino-Japanese compound 直径 (chokkei) joins 直 (choku, "straight") with 径 (kei, "path or distance"), describing a straight distance across a circle.

Usage tips

  • The word diameter appears beyond geometry when the size of circular objects such as plates and tires is stated.

Word lists with this word