Bissextile :: Bissextile (n.) Leap year; every fourth year, in which a day is added to the month of February on account of the excess of the tropical year (365 d. 5 h. 48 m. 46 s.) above 365 days. But one day added every four years is equivalent to six hours each year, which is 11 m. 14 s. more than the excess of the real year. Hence, it is necessary to suppress the bissextile day at the end of every century which is not divisible by 400, while it is retained at the end of those which are divisible by 400..

Bissextile :: Bissextile (a.) Pertaining to leap year.

Decimosexto :: Decimosexto (n.) A book consisting of sheets, each of which is folded into sixteen leaves; hence, indicating, more or less definitely, a size of book; -- usually written 16mo or 16�..

Decimosexto :: Decimosexto (a.) Having sixteen leaves to a sheet; as, a decimosexto form, book, leaf, size..

Semisextile :: Semisextile (n.) An aspect of the planets when they are distant from each other the twelfth part of a circle, or thirty degrees..

Sext :: Sext (n.) The office for the sixth canonical hour, being a part of the Breviary..

Sext :: Sext (n.) The sixth book of the decretals, added by Pope Boniface VIII..

Sextain :: Sextain (n.) A stanza of six lines; a sestine.

Sextans :: Sextans (n.) A Roman coin, the sixth part of an as..

Sextans :: Sextans (n.) A constellation on the equator south of Leo; the Sextant.

Sextant :: Sextant (n.) The sixth part of a circle.

Sextant :: Sextant (n.) An instrument for measuring angular distances between objects, -- used esp. at sea, for ascertaining the latitude and longitude. It is constructed on the same optical principle as Hadley's quadrant, but usually of metal, with a nicer graduation, telescopic sight, and its arc the sixth, and sometimes the third, part of a circle. See Quadrant..

Sextant :: Sextant (n.) The constellation Sextans.

Sextaries :: Sextaries (pl. ) of Sextar.

Sextary :: Sextary (n.) An ancient Roman liquid and dry measure, about equal to an English pint..

Sextary :: Sextary (n.) A sacristy.

Sextet :: Sextet (n.) Alt. of Sextett.

Sextetto :: Sextetto (n.) See Sestet.

Sexteyn :: Sexteyn (n.) A sacristan.

Sextic :: Sextic (a.) Of the sixth degree or order.

Sextic :: Sextic (n.) A quantic of the sixth degree.

Sextile :: Sextile (a.) Measured by sixty degrees; fixed or indicated by a distance of sixty degrees.

Sextile :: Sextile (n.) The aspect or position of two planets when distant from each other sixty degrees, or two signs. This position is marked thus: /..

Sextillion :: Sextillion (n.) According to the method of numeration (which is followed also in the United States), the number expressed by a unit with twenty-one ciphers annexed. According to the English method, a million raised to the sixth power, or the number expressed by a unit with thirty-six ciphers annexed. See Numeration..

Sexto :: Sexto (n.) A book consisting of sheets each of which is folded into six leaves.

Sextodecimo :: Sextodecimo (a.) Having sixteen leaves to a sheet; of, or equal to, the size of one fold of a sheet of printing paper when folded so as to make sixteen leaves, or thirty-two pages; as, a sextodecimo volume..

Sextodecimo :: Sextodecimo (n.) A book composed of sheets each of which is folded into sixteen leaves; hence, indicating, more or less definitely, a size of a book; -- usually written 16mo, or 16�..

Sextodecimos :: Sextodecimos (pl. ) of Sextodecim.

Sextolet :: Sextolet (n.) A double triplet; a group of six equal notes played in the time of four.

Sexton :: Sexton (n.) An under officer of a church, whose business is to take care of the church building and the vessels, vestments, etc., belonging to the church, to attend on the officiating clergyman, and to perform other duties pertaining to the church, such as to dig graves, ring the bell, etc..

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