Alternative form of year-round.

(historical) A conflict fought largely within the Holy Roman Empire from 1618 to 1648.

plural of New Year's Eve

(law, England & Wales, formal, misleading) An estate in land held for a term of years of either a specified length or on a periodic basis, and which is not a term of years determinable (though may be determinable for other reasons); a leasehold estate in land.

(law, England & Wales, formal, historical) An estate in land held for a term of years which determined on the deaths of certain individuals, or the cessation of certain life interests.

A project that is culmination of an academic course or major. This is typically done at the end of said course or major.

(medicine) A unit of measurement, equivalent to one year of life in perfect health, that can be used to decide whether a medical procedure is worthwhile for an individual.

plural of quality-adjusted life year

A storm of such force that it occurs only once every one hundred years approximately.

plural of one-hundred-year storm