Julian

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

• Emperor of Rome (361–363) who attempted to replace Christianity with paganism as the dominant religion.
• Percy Lavon,American chemist who synthesized a compound used to treat glaucoma and developed an inexpensive technique for synthesizing cortisone.

from The Century Dictionary.

• In geology, noting a group of the pelagic Triassic system in Europe and Asia, forming the middle part of the Carinthian stage preceded by the Cordevolian group and followed by the Tuvalian. In the Mediterranean Triassic province it is represented by the Raibl beds.
• noun The Julian group.
• Pertaining to or derived from Julius Cæsar

from the GNU version of the Collaborative International Dictionary of English.

• adjective Relating to, or derived from, Julius Cæsar.
• adjective the calendar as adjusted by Julius Cæsar, in which the year was made to consist of 365 days, each fourth year having 366 days.
• adjective the epoch of the commencement of the Julian calendar, or 46 b. c.
• adjective a chronological period of 7,980 years, combining the solar, lunar, and indiction cycles (28 x 19 x 15 = 7,980), being reckoned from the year 4713 B. C., when the first years of these several cycles would coincide, so that if any year of the period be divided by 28, 19, or 15, the remainder will be the year of the corresponding cycle. The Julian period was proposed by Scaliger, to remove or avoid ambiguities in chronological dates, and was so named because composed of Julian years.
• adjective the year of 365 days, 6 hours, adopted in the Julian calendar, and in use until superseded by the Gregorian year, as established in the reformed or Gregorian calendar.

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

• proper noun The Roman emperor Flavius Claudius Julianus or Julian the Apostate.
• proper noun A male given name derived, via Julianus from Julius
• proper noun A female given name derived from Juliana. It was popular in medieval England but today mostly appears in the form Gillian.
• adjective of, or relating to Julius Caesar

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

• adjective of or relating to or characteristic of Julius Caesar
• noun Roman Emperor and nephew of Constantine; he restored paganism as the official religion of the Roman Empire and destroyed Christian temples but his decision was reversed after his death (331?-363)