also: わたり
Refers to the diameter of a circle or sphere. Common in mathematical and technical contexts.
The diameter of this circle is 10 centimeters.
I made a cylinder with a diameter of 5 cm.
I need to measure the diameter of the pipe.
径 is the general term for a diameter, while 口径 narrows this to the bore or caliber diameter of a gun, pipe, or lens.
Standard kanji form for 'diameter'.
Obsolete kana usage; rarely used in modern Japanese.
The kanji 径 originally meant 'path' or 'shortcut', and by extension came to denote a straight line through the center of a circle. The reading けい is the on'yomi.
mountain path; mountain trail
great difference; wide divergence
acting directly; going right ahead
span; distance between two points; distance between supports
flat length (of a rubber band)
shortcut; expedient
polar axis
particle diameter; grain size