Alternative spelling of yearlong.

The time taken for the Earth to complete one revolution with respect to its apsides, usually defined as the time between perihelion passages.

Toxicodendron diversilobum, western poison oak.

(obsolete) Yacht.

(dialect) head

(education) The annual period during which a student attends school, college or university.

plural of yead

A year of rest for the land observed every seven years in ancient Judea, which included allowing the fields to lie without tilling, sowing, or reaping from one autumn to the next in accordance with a Levitical commandment.

(law) A year in the reign of a monarch, beginning on the day of accession, the set of which are numbered ordinally. Formerly laws in the United Kingdom were identified in part by the regnal year of the monarch, and this practice is still followed in some Commonwealth countries.

(hydrology) The timespan between October 1 and September 30 of the next year, differing from the calendar year because part of the precipitation that falls in late autumn and winter accumulates as snow and does not drain until the following spring or summer.