solar year

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun The period of time required for the earth to make one complete revolution around the sun, measured from one vernal equinox to the next and equal to 365 days, 5 hours, 48 minutes, 45.51 seconds.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun The time it takes the Earth to pass once around the Sun, for instance from vernal equinox to vernal equinox.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun the time for the earth to make one revolution around the sun, measured between two vernal equinoxes