回かい帰き年ねん

noun

tropical year; solar year

Astronomical term for the time it takes the Sun to return to the same position relative to the equinoxes, about 365.2422 days. Often contrasted with the sidereal year (恒星年).

See also: 太陽年

• 回かい帰き年ねんは約やく365.2422日にちです。

  The tropical year is about 365.2422 days.

• グレゴリオ暦れきは回かい帰き年ねんに基もとづいて設せっ計けいされた。

  The Gregorian calendar was designed based on the tropical year.