tropical year

tropical year, time between successive vernal equinoxes 365 days, 5 hr, 48 min, 46 sec of mean solar time (see solar time ). The tropical year is the basis of the year used in the Gregorian calendar .

The Columbia Electronic Encyclopedia, 6th ed. Copyright © 2012, Columbia University Press. All rights reserved.

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The Columbia Electronic Encyclopedia, 6th ed. Copyright © 2012, Columbia University Press. All rights reserved.