The Roman emperor Flavius Claudius Julianus or Julian the Apostate. / A male given name from Latin Iulianus, from Iulius. / A female given name from Latin, of medieval English usage, variant of Gillian.

Of or relating to Julius Caesar. / Of or relating to the Julia programming language.

Synonym of Julian day.

The calendar which was used in the western world before the present-day Gregorian calendar. The Julian calendar differed in having all multiple-of-4 years as leap years.

(historical) A year in the old Julian calendar that has either 365 or 366 days. / (astronomy) A unit of measurement of time defined as exactly 365.25 days of 86400 SI seconds each.

plural of Julian year

A date expressed as a real number of days counted with GMT noon on 1 January 4713 BC in proleptic Julian calendar (November 24, 4714 BC, in the proleptic Gregorian calendar) as zero; used primarily by astronomers and historians to compare events recorded in different cultures.

plural of Julian date

plural of Julian day

(meteorology) The largest element of the intraseasonal variability in the tropical atmosphere: a large-scale coupling between atmospheric circulation and tropical deep convection, manifesting itself most clearly as anomalous rainfall.