Definition of Epoch. Meaning of Epoch. Synonyms of Epoch

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Definition of Epoch

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Acadian epoch
Acadian A*ca"di*an, a. Of or pertaining to Acadie, or Nova Scotia. ``Acadian farmers.' --Longfellow. -- n. A native of Acadie. Acadian epoch (Geol.), an epoch at the beginning of the American paleozoic time, and including the oldest American rocks known to be fossiliferous. See Geology. Acadian owl (Zo["o]l.), a small North American owl (Nyctule Acadica); the saw-whet.
Antiochian epoch
Antiochian An`ti*o"chi*an, a. 1. Pertaining to Antiochus, a contemporary with Cicero, and the founder of a sect of philosophers. 2. Of or pertaining to the city of Antioch, in Syria. Antiochian epoch (Chron.), a method of computing time, from the proclamation of liberty granted to the city of Antioch, about the time of the battle of Pharsalia, B.C. 48.
Calciferous epoch
Calciferous Cal*cif"er*ous, a. [L. calx, calcis, lime + -ferous.] Bearing, producing, or containing calcite, or carbonate of lime. Calciferous epoch (Geol.), an epoch in the American lower Silurian system, immediately succeeding the Cambrian period. The name alludes to the peculiar mixture of calcareous and siliceous characteristics in many of the beds. See the Diagram under Geology.
Cauda galli epoch
Cauda galli Cau"da gal*li, . [L., tail of a cock.] (Paleon.) A plume-shaped fossil, supposed to be a seaweed, characteristic of the lower Devonian rocks; as, the cauda galli grit. Cauda galli epoch (Geol.), an epoch at the begining of the Devonian age in eastern America, so named from the characteristic gritty sandstone marked with impressions of cauda galli. See the Diagram under Geology.
Chazy epoch
Chazy epoch Cha*zy" ep"och (Geol.) An epoch at the close of the Canadian period of the American Lower Silurian system; -- so named from a township in Clinton Co., New York. See the Diagram under Geology.
Cincinnati epoch
Cincinnati epoch Cin`cin*na"ti ep"och (Geol.) An epoch at the close of the American lower Silurian system. The rocks are well developed near Cincinnati, Ohio. The group includes the Hudson River and Lorraine shales of New York.
Drift epoch
Drift Drift, a. That causes drifting or that is drifted; movable by wind or currents; as, drift currents; drift ice; drift mud. --Kane. Drift anchor. See Sea anchor, and also Drag sail, under Drag, n. Drift epoch (Geol.), the glacial epoch. Drift net, a kind of fishing net. Drift sail. Same as Drag sail. See under Drag, n.
epoch or period
Glacial Gla"cial, a. [L. glacialis, from glacies ice: cf. F. glacial.] 1. Pertaining to ice or to its action; consisting of ice; frozen; icy; esp., pertaining to glaciers; as, glacial phenomena. --Lyell. 2. (Chem.) Resembling ice; having the appearance and consistency of ice; -- said of certain solid compounds; as, glacial phosphoric or acetic acids. Glacial acid (Chem.), an acid of such strength or purity as to crystallize at an ordinary temperature, in an icelike form; as acetic or carbolic acid. Glacial drift (Geol.), earth and rocks which have been transported by moving ice, land ice, or icebergs; bowlder drift. Glacial epoch or period (Geol.), a period during which the climate of the modern temperate regions was polar, and ice covered large portions of the northern hemisphere to the mountain tops. Glacial theory or hypothesis. (Geol.) See Glacier theory, under Glacier.
Epocha
Epocha Ep"o*cha, n. [L.] See Epoch. --J. Adams.
Epochal
Epochal Ep"o*chal, a. Belonging to an epoch; of the nature of an epoch. ``Epochal points.' --Shedd.
Epochra Canadensis
Currant Cur"rant (k?r"rant), n. [F. corinthe (raisins de Corinthe raisins of Corinth) currant (in sense 1), from the city of Corinth in Greece, whence, probably, the small dried grape (1) was first imported, the Ribes fruit (2) receiving the name from its resemblance to that grape.] 1. A small kind of seedless raisin, imported from the Levant, chiefly from Zante and Cephalonia; -- used in cookery. 2. The acid fruit or berry of the Ribes rubrum or common red currant, or of its variety, the white currant. 3. (Bot.) A shrub or bush of several species of the genus Ribes (a genus also including the gooseberry); esp., the Ribes rubrum. Black currant,a shrub or bush (Ribes nigrum and R. floridum) and its black, strong-flavored, tonic fruit. Cherry currant, a variety of the red currant, having a strong, symmetrical bush and a very large berry. Currant borer (Zo["o]l.), the larva of an insect that bores into the pith and kills currant bushes; specif., the larvae of a small clearwing moth ([AE]geria tipuliformis) and a longicorn beetle (Psenocerus supernotatus). Currant worm (Zo["o]l.), an insect larva which eats the leaves or fruit of the currant. The most injurious are the currant sawfly (Nematus ventricosus), introduced from Europe, and the spanworm (Eufitchia ribearia). The fruit worms are the larva of a fly (Epochra Canadensis), and a spanworm (Eupithecia). Flowering currant, Missouri currant, a species of Ribes (R. aureum), having showy yellow flowers.
Genesee epoch
Genesee epoch Gen`e*see" ep"och (Geol.) The closing subdivision of the Hamilton period in the American Devonian system; -- so called because the formations of this period crop out in Genesee, New York.
H epoch
Hallstatt Hall"statt, Hallstattian Hall*stat"ti*an, a. Of or pert. to Hallstatt, Austria, or the Hallstatt civilization. Hallstatt, or Hallstattian, civilization, a prehistoric civilization of central Europe, variously dated at from 1000 to 1500 b. c. and usually associated with the Celtic or Alpine race. It was characterized by expert use of bronze, a knowledge of iron, possession of domestic animals, agriculture, and artistic skill and sentiment in manufacturing pottery, ornaments, etc. The Hallstattian civilization flourished chiefly in Carinthia, southern Germany, Switzerland, Bohemia, Silesia, Bosnia, the southeast of France, and southern Italy. --J. Deniker. H. epoch, the first iron age, represented by the Hallstatt civilization.
Julian epoch
Julian Jul"ian (?; 277) a. [L. Julianus, fr. Julius. Cf. July, Gillian.] Relating to, or derived from, Julius C[ae]sar. Julian calendar, the calendar as adjusted by Julius C[ae]sar, in which the year was made to consist of 365 days, each fourth year having 366 days. Julian epoch, the epoch of the commencement of the Julian calendar, or 46 b. c. Julian period, 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. Julian year, 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.
Medina epoch
Medina epoch Me*di"na ep"och [From Medina in New York.] (Geol.) A subdivision of the Niagara period in the American upper Silurian, characterized by the formations known as the Oneida conglomerate, and the Medina sandstone. See the Chart of Geology.
Terrace epoch
Terrace Ter"race, n. [F. terrasse (cf. Sp. terraza, It. terrazza), fr. L. terra the earth, probably for tersa, originally meaning, dry land, and akin to torrere to parch, E. torrid, and thirst. See Thirst, and cf. Fumitory, Inter, v., Patterre, Terrier, Trass, Tureen, Turmeric.] 1. A raised level space, shelf, or platform of earth, supported on one or more sides by a wall, a bank of tuft, or the like, whether designed for use or pleasure. 2. A balcony, especially a large and uncovered one. 3. A flat roof to a house; as, the buildings of the Oriental nations are covered with terraces. 4. A street, or a row of houses, on a bank or the side of a hill; hence, any street, or row of houses. 5. (Geol.) A level plain, usually with a steep front, bordering a river, a lake, or sometimes the sea. Note: Many rivers are bordered by a series of terraces at different levels, indicating the flood plains at successive periods in their history. Terrace epoch. (Geol.) See Drift epoch, under Drift, a.

Meaning of Epoch from wikipedia

- Look up epoch in Wiktionary, the free dictionary. In chronology and periodization, an epoch or reference epoch is an instant in time chosen as the origin...
- The Epoch Times is a far-right international multi-language newspaper and media company affiliated with the Falun Gong new religious movement. The newspaper...
- In astronomy, an epoch or reference epoch is a moment in time used as a reference point for some time-varying astronomical quantity. It is useful for the...
- seconds that have elapsed since 00:00:00 UTC on 1 January 1970, the Unix epoch. For example, at midnight on 1 January 2010, Unix time was 1262304000. Unix...
- Look up epoch in Wiktionary, the free dictionary. An epoch is an instant in time chosen as the origin of a particular calendar era. Epoch or EPOCH may also...
- In computing, an epoch is a fixed date and time used as a reference from which a computer measures system time. Most computer systems determine time as...
- often combined with rituximab. In this case it is called R-EPOCH or EPOCH-R. The R-EPOCH regimen consists of: Rituximab: an anti-CD20 monoclonal antibody...
- Pleiocene) is the epoch in the geologic time scale that extends from 5.33 to 2.58 million years ago (Ma). It is the second and most recent epoch of the Neogene...
- Holocene (/ˈhɒl.əsiːn, -oʊ-, ˈhoʊ.lə-, -loʊ-/) is the current geological epoch, beginning approximately 11,700 years ago. It follows the Last Glacial Period...
- the photon epoch was the period in the evolution of the early universe in which photons dominated the energy of the universe. The photon epoch started after...