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From The Collaborative International Dictionary of English v.0.44 [gcide]:
Sidereal \Si*de"re*al\, adjective [L. sidereus, from sidus, sideris, a constellation, a star. Cf. {Sideral}, {Consider}, {Desire}.]
1. Relating to the stars; starry; astral; as, sidereal astronomy.
2. (Astron.) Measuring by the apparent motion of the stars; designated, marked out, or accompanied, by a return to the same position in respect to the stars; as, the sidereal revolution of a planet; a sidereal day.
{Sidereal clock}, {day}, {month}, {year}. See under {Clock}, {Day}, etc.
{Sideral time}, time as reckoned by sideral days, or, taking the sidereal day as the unit, the time elapsed since a transit of the vernal equinox, reckoned in parts of a sidereal day. This is, strictly, apparent sidereal time, mean sidereal time being reckoned from the transit, not of the true, but of the mean, equinoctial point.
From The Collaborative International Dictionary of English v.0.44 [gcide]:
Day \Day\ (d[=a]), noun [OE. day, dai, dei, AS. d[ae]g; akin to OS., D., Dan., & Sw. dag, G. tag, Icel. dagr, Goth. dags; cf. Skr. dah (for dhagh ?) to burn. [root]69. Cf. {Dawn}.]
1. The time of light, or interval between one night and the next; the time between sunrise and sunset, or from dawn to darkness; hence, the light; sunshine; -- also called {daytime}. [1913 Webster +PJC]
2. The period of the earth's revolution on its axis. -- ordinarily divided into twenty-four hours. It is measured by the interval between two successive transits of a celestial body over the same meridian, and takes a specific name from that of the body. Thus, if this is the sun, the day (the interval between two successive transits of the sun's center over the same meridian) is called a {solar day}; if it is a star, a {sidereal day}; if it is the moon, a {lunar day}. See {Civil day}, {Sidereal day}, below.
3. Those hours, or the daily recurring period, allotted by usage or law for work.
4. A specified time or period; time, considered with reference to the existence or prominence of a person or thing; age; time.
A man who was great among the Hellenes of his day. --Jowett (Thucyd. )
If my debtors do not keep their day, . . . I must with patience all the terms attend. --Dryden.
5. (Preceded by the) Some day in particular, as some day of contest, some anniversary, etc.
The field of Agincourt, Fought on the day of Crispin Crispianus. --Shak.
His name struck fear, his conduct won the day. --Roscommon.
Note: Day is much used in self-explaining compounds; as, daybreak, daylight, workday, etc.
{Anniversary day}. See {Anniversary}, noun
{Astronomical day}, a period equal to the mean solar day, but beginning at noon instead of at midnight, its twenty-four hours being numbered from 1 to 24; also, the sidereal day, as that most used by astronomers.
{Born days}. See under {Born}.
{Canicular days}. See {Dog day}.
{Civil day}, the mean solar day, used in the ordinary reckoning of time, and among most modern nations beginning at mean midnight; its hours are usually numbered in two series, each from 1 to 12. This is the period recognized by courts as constituting a day. The Babylonians and Hindoos began their day at sunrise, the Athenians and Jews at sunset, the ancient Egyptians and Romans at midnight.
{Day blindness}. (Med.) See {Nyctalopia}.
{Day by day}, or {Day after day}, daily; every day; continually; without intermission of a day. See under {By}. ''Day by day we magnify thee.'' --Book of Common Prayer.
{Days in bank} (Eng. Law), certain stated days for the return of writs and the appearance of parties; -- so called because originally peculiar to the Court of Common Bench, or Bench (bank) as it was formerly termed. --Burrill.
{Day in court}, a day for the appearance of parties in a suit.
{Days of devotion} (R. C. Ch.), certain festivals on which devotion leads the faithful to attend mass. --Shipley.
{Days of grace}. See {Grace}.
{Days of obligation} (R. C. Ch.), festival days when it is obligatory on the faithful to attend Mass. --Shipley.
{Day owl}, (Zo["o]l.), an owl that flies by day. See {Hawk owl}.
{Day rule} (Eng. Law), an order of court (now abolished) allowing a prisoner, under certain circumstances, to go beyond the prison limits for a single day.
{Day school}, one which the pupils attend only in daytime, in distinction from a boarding school.
{Day sight}. (Med.) See {Hemeralopia}.
{Day's work} (Naut.), the account or reckoning of a ship's course for twenty-four hours, from noon to noon.
{From day to day}, as time passes; in the course of time; as, he improves from day to day.
{Jewish day}, the time between sunset and sunset.
{Mean solar day} (Astron.), the mean or average of all the apparent solar days of the year.
{One day}, {One of these days}, at an uncertain time, usually of the future, rarely of the past; sooner or later. ''Well, niece, I hope to see you one day fitted with a husband.'' --Shak.
{Only from day to day}, without certainty of continuance; temporarily. --Bacon.
{Sidereal day}, the interval between two successive transits of the first point of Aries over the same meridian. The Sidereal day is 23 h. 56 m. 4.09 s. of mean solar time.
{To win the day}, to gain the victory, to be successful. --S. Butler.
{Week day}, any day of the week except Sunday; a working day.
{Working day}. (a) A day when work may be legally done, in distinction from Sundays and legal holidays. (b) The number of hours, determined by law or custom, during which a workman, hired at a stated price per day, must work to be entitled to a day's pay.
From WordNet (r) 2.0 [wn]:
day
noun
1: time for Earth to make a complete rotation on its axis; "two days later they left"; "they put on two performances every day"; "there are 30,000 passengers per day" [syn: {twenty-four hours}, {solar day}, {mean solar day}]
2: some point or period in time; "it should arrive any day now"; "after that day she never trusted him again"; "those were the days"; "these days it is not unusual"
3: the time after sunrise and before sunset while it is light outside; "the dawn turned night into day"; "it is easier to make the repairs in the daytime" [syn: {daytime}, {daylight}] [ant: {night}]
4: a day assigned to a particular purpose or observance; "Mother's Day"
5: the recurring hours when you are not sleeping (especially those when you are working); "my day began early this morning"; "it was a busy day on the stock exchange"; "she called it a day and went to bed"
6: an era of existence or influence; "in the day of the dinosaurs"; "in the days of the Roman Empire"; "in the days of sailing ships"; "he was a successful pianist in his day"
7: a period of opportunity; "he deserves his day in court"; "every dog has his day"
8: the period of time taken by a particular planet (e.g. Mars) to make a complete rotation on its axis; "how long is a day on Jupiter?"
9: the time for one complete rotation of the earth relative to a particular star, about 4 minutes shorter than a mean solar day [syn: {sidereal day}]
10: United States writer best known for his autobiographical works (1874-1935) [syn: {Clarence Day}, {Clarence Shepard Day Jr.}]
From Moby Thesaurus II by Grady Ward, 1.0 [moby-thes]:
108 Moby Thesaurus words for "day": International Date Line, Platonic year, abundant year, academic year, aeon, age, annum, annus magnus, antedate, bissextile year, broad day, calendar month, calendar year, century, common year, cycle, cycle of indiction, date, date line, datemark, dawn, day glow, daylight, dayshine, daytide, daytime, decade, decennary, decennium, defective year, dusk, epoch, era, fateful moment, fiscal year, fortnight, full sun, generation, great year, green flash, heyday, hour, indiction, instant, interval, juncture, kairos, leap year, lifetime, light, light of day, lunar month, lunar year, lunation, luster, lustrum, man-hour, microsecond, midday sun, millennium, millisecond, minute, moment, moment of truth, month, moon, noonlight, noontide light, period, point, point of time, postdate, pregnant moment, prime, psychological moment, quarter, quinquennium, ray of sunshine, regular year, season, second, semester, session, shine, sidereal year, solar year, space, span, spell, stage, stretch, sun, sun spark, sunbeam, sunbreak, sunburst, sunlight, sunshine, term, time, time lag, trimester, twelvemonth, twilight, week, weekday, while, year
From THE DEVIL'S DICTIONARY ((C)1911 Released April 15 1993) [devils]:
DAY, noun A period of twenty-four hours, mostly misspent. This period is divided into two parts, the day proper and the night, or day improper -- the former devoted to sins of business, the latter consecrated to the other sort. These two kinds of social activity overlap.
From U.S. Gazetteer (1990) [gazetteer]:
Day, FL Zip code(s): 32013
From U.S. Gazetteer Counties (2000) [gaz-county]:
Day -- U.S. County in South Dakota Population (2000): 6267 Housing Units (2000): 3618 Land area (2000): 1028.574329 sq. miles (2663.995168 sq. km) Water area (2000): 62.634335 sq. miles (162.222176 sq. km) Total area (2000): 1091.208664 sq. miles (2826.217344 sq. km) Located within: South Dakota (SD), FIPS 46 Location: 45.373992 N, 97.572474 W Headwords: Day Day, SD Day County Day County, SD
From Easton's 1897 Bible Dictionary [easton]:
Day The Jews reckoned the day from sunset to sunset (Lev. 23:32). It was originally divided into three parts (Ps. 55:17). "The heat of the day" (1 Sam. 11:11; Neh. 7:3) was at our nine o'clock, and "the cool of the day" just before sunset (Gen. 3:8). Before the Captivity the Jews divided the night into three watches, (1) from sunset to midnight (Lam. 2:19); (2) from midnight till the cock-crowing (Judg. 7:19); and (3) from the cock-crowing till sunrise (Ex. 14:24). In the New Testament the division of the Greeks and Romans into four watches was adopted (Mark 13:35). (See {WATCHES}.) The division of the day by hours is first mentioned in Dan. 3:6, 15; 4:19; 5:5. This mode of reckoning was borrowed from the Chaldeans. The reckoning of twelve hours was from sunrise to sunset, and accordingly the hours were of variable length (John 11:9). The word "day" sometimes signifies an indefinite time (Gen. 2:4; Isa. 22:5; Heb. 3:8, etc.). In Job 3:1 it denotes a birthday, and in Isa. 2:12, Acts 17:31, and 2 Tim. 1:18, the great day of final judgment.
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