分ぶん点てん

noun

equinoctial point

Astronomical term for the two points where the celestial equator intersects the ecliptic (vernal and autumnal equinox points).

• 春しゅん分ぶん点てんと秋しゅう分ぶん点てんを合あわせて分ぶん点てんと呼よぶ。

  The vernal equinox point and the autumnal equinox point are together called the equinoctial points.

noun

division point

Mathematical term for a point that divides a line segment or curve into parts, often in a given ratio.

• 線せん分ぶんABを3:2に内ない分ぶんする分ぶん点てんをPとする。

  Let P be the division point that internally divides the line segment AB in the ratio 3:2.