自じ転てん軸じくじてんじくMeanings1nounrotational axisastronomyAstronomical term for the axis around which a celestial body rotates.地ち球きゅうの自じ転てん軸じくは約やく23.4度ど傾かたむいている。The Earth's rotational axis is tilted about 23.4 degrees.