tropical year

A tropical year (also known as a solar year) is the length of time the Sun, as seen from the Earth, takes to return to the same position along the ecliptic (its path among the stars on the celestial sphere) relative to the equinoxes and solstices. The length of time depends on the point of the ecliptic. Starting from the (northern) vernal equinox, one of the four cardinal points along the ecliptic, yields the vernal equinox year; averaging over all starting points on the ecliptic yields the mean tropical year.
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Noun
1. the time for the earth to make one revolution around the sun, measured between two vernal equinoxes
(synonym) solar year, astronomical year, equinoctial year
(hypernym) year

Tropical Year The time taken by the center of the sun's disc to travel from one tropic to the same tropic again, and being 365.2422 mean solar days, or 365 days, 5 hours, 48 minutes, 45.5 seconds. This is shorter than the sidereal year (the interval between two successive passages of the sun across the same point in the stellar sphere), because the tropics recede by precession. On the tropical year depends the regular succession of the seasons, and it is the one which is adapted to the civil calendar by the Julian and Gregorian intercalations. See also YEAR 

n. ปีทางสุริยคติ, equinoctial year; solar year