直径|ちょっけいchokkei[0]heiban (flat)

1. noundiameter
   その穴あなは直径ちょっけい二にメートルです。↗

   The hole is two meters across.

• Synonym差し渡しさしわたしNeutralNative word for the span of an object from one end to the other; it can also be used for a circle's diameter, as in 「差し渡し1メートル」.
• Related径けいWrittenWritten word for diameter or caliber, mostly seen in compounds like 「口径」「半径」; rarely used on its own.

For the diameter of a circle or sphere, 「直径」 is the default, as in 「直径10センチ」. Use 「差し渡し」 when measuring how far an object reaches from one end to the other; 「径」 turns up in written compounds like 「口径」.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

1. 円えんや球たまの中心ちゅうしんを通とおり両端りょうたんが円周えんしゅう上じょうまたは球面きゅうめん上じょうにある線分せんぶん。また、その長ながさ。