• WordNet 3.6
    • adj Gregorian of or relating to Pope Gregory XIII or the calendar he introduced in 1582
    • adj Gregorian of or relating to Pope Gregory I or to the plainsong chants of the Roman Catholic Church
    • ***
Webster's Revised Unabridged Dictionary
  • Interesting fact: England and the American colonies adopted the Gregorian calendar on September 14th, 1752. 11 days disappeared.
    • a Gregorian Pertaining to, or originated by, some person named Gregory, especially one of the popes of that name.
    • ***
Century Dictionary and Cyclopedia
  • Interesting fact: The Gregorian calendar was introduced by Pope Gregory in 1582 AD, and was adopted by Great Britain and the English colonies in 1752.
    • gregorian Of or pertaining to one of several persons-popes and others-named Gregory; especially, pertaining to Pope Gregory I., the Great (a. d. 590–604), or to Pope Gregory XIII. (1572–85).
    • n gregorian One of a club or brotherhood somewhat similar to the Freemasons, which existed in England in the early part of the eighteenth century. See Gormogon.
    • n gregorian A kind of wig worn in the seventeenth century: so named, it is said, from the inventor, one Gregory, a barber in the Strand, London.
    • n gregorian In music, a melody written in one of the church modes; a piece of plainsong.
    • ***
Chambers's Twentieth Century Dictionary
    • adj Gregorian gre-gō′ri-an belonging to or established by Pope Gregory; as the Gregorian chant or tones, introduced by Gregory I. (6th century), and the calendar, reformed by Gregory XIII. (1582): one of an 18th-century English brotherhood.
    • Gregorian derived from the above by Ambrose, Gregory the Great, &c., each of the seven natural sounds of the diatonic scale forming the keynote or final of a mode, which embraced that note and the seven above it. To each of these seven modes is attached another, in which the melody, while having the same final or keynote, instead of ascending to the octave above, ranges from the fourth below it to the fifth above. The former are called the authentic modes, the latter plagal
    • ***


Webster's Revised Unabridged Dictionary
NL. Gregorianus, fr. Gregorius, Gregory, Gr. : cf. F. grégorien,
Chambers's Twentieth Century Dictionary
Fr.,—L. modus.


In literature:

Have figured music in Gothic churches, keep your Gregorian for Basilicas.
"Cardinal Newman as a Musician" by Edward Bellasis
The Museum at Naples contains about 2,100, and the Gregorian Museum at Rome about 1,000.
"Museum of Antiquity" by L. W. Yaggy
I'm not up in musical terms, but I think the tune was a kind of Gregorian chant, and as mournful as a dog howling at night.
"Treasure Valley" by Marian Keith
This was made with his five-and-a-half-foot Gregorian reflector.
"Sir William Herschel: His Life and Works" by Edward Singleton Holden
He introduced the Gregorian chant.
"Italy, the Magic Land" by Lilian Whiting
Change from the Old to the New (or Gregorian) style of calendar in England.
"The Great Events by Famous Historians, v. 13" by Various
Gregorian modes in folk-songs, 20.
"Music: An Art and a Language" by Walter Raymond Spalding
The Eight Gregorian Tones, with their several endings; 2.
"Australia, its history and present condition" by William Pridden
The Gregorian party argued that the Emperor derived his crown from the nation, and that the nation could take away what it had bestowed.
"The History of Freedom" by John Emerich Edward Dalberg-Acton
The above extract throws an important light on the progress of the Gregorian reform of the ecclesiastical chant.
"St. Gregory and the Gregorian Music" by E. G. P. Wyatt

In news:

Gregorian in deep stretch and charged to a one-length victory in the Prix Jean Prat (Fr-I) at Chantilly July 1.
Our only remaining option was to Songify the whole thing ourselves, to imagine the parallel universe where Gregorian chanting monks shepherded the candidates through the debate as Bob Schieffer dropped verse after verse.
The Gregory Brothers Songify the foreign policy debate, with Gregorian chanting .
Mount Vernon group gets Gregorian tutorial.
It is when the monks begin their Gregorian chants in the dimly lit, 19th Century chapel that adjoins the guesthouse.
Gregorian previews Shostakovich Seventh.
Gregorian Previews MSU Symphony Concert.
Vartan Gregorian , President of the Carnegie Foundation, published his would-be letter from President Obama to the Iranian leadership in US News & World Report.
Schoenberg Could One Day Sound as Remote as Gregorian Chant.
Schoenberg Could One Day Sound as Remote as Gregorian Chant .
Two professors, an astrophysicist and an economist, propose junking the leap day dependent Gregorian Calendar for a 364-day (52-week) year and a leap week every once in a while.
Several years ago I presented a lecture at the Pontifical Gregorian University concerning the presentation of Jews and Judaism in the Catholic Sunday Lectionary (subsequently published here).
Peter Conn holds the Vartan Gregorian Chair in English at the University of Pennsylvania, where he is also a professor of education.
The show began with a processional of monks wearing blood-red robes and intoning ominous Gregorian chants.
A fresh look at the Mayan-to-Gregorian calendar conversion suggests that the world might not actually come to an end on Dec 21, 2012.

In science:

The collaboration is investigating different layouts for the combiner, possibly including lenses, starting with classical astronomical telescope designs such as Gregorian and Cassegrain, and bearing in mind the constraints above.
QUBIC: The QU Bolometric Interferometer for Cosmology
We are therefore currently studying the optimization of an off-axis Gregorian telescope.
QUBIC: The QU Bolometric Interferometer for Cosmology
The ATA, when finished, will consist of 350 units of 6.1 m offset Gregorian antennas that, with associated electronics, will cover the band 0.5−11.2 GHz, all at once.
Astrophysics in 2006
Using fast focal ratios (f1.142 ) for the primary mirrors allowed to locate two elliptical secondary mirrors of 0.91m diameter in a Gregorian configuration.
Design of the wavefront sensor unit of ARGOS, the LBT laser guide star system
The MAX instrument consists of an off-axis Gregorian telescope and a bolometric photometer mounted on an attitude-controlled balloon-borne platform which makes measurements at an altitude of 36 km.
The Cosmic Microwave Background Anisotropy Experiments