tropical year(redirected from Mean tropical year)
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Related to Mean tropical year: solar year
See solar year.
Equals the time interval between two consecutive passages of the Sun, in one direction, through the Earth’s equatorial plane (or from vernal equinox to vernal equinox; 365 days, 5 hr, 48 min, 46 sec).
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|Noun||1.||tropical year - the time for the earth to make one revolution around the sun, measured between two vernal equinoxes|
year - the period of time that it takes for a planet (as, e.g., Earth or Mars) to make a complete revolution around the sun; "a Martian year takes 687 of our days"