counter
counter for laps or circuits
Used to count laps around a track, circuits of a course, or rounds of a competition.
トラックを一周する。
I run one lap around the track.
このコースを三周走った。
I ran three laps of this course.
noun
Mathematical term for the length of the boundary of a shape.
この長方形の周の長さを求めなさい。
Find the perimeter of this rectangle.
noun
Zhou dynasty; Chou dynasty
Historical term referring to the Zhou dynasty of ancient China (approx. 1046–256 BCE).
周王朝は約八百年続いた。
The Zhou dynasty lasted for about eight hundred years.