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delta 音標拼音: [d'ɛltə] n. 三角州,希臘字母的第四個字 三角州,希臘字母的第四個字 delta增量 差量 delta n 1: a low triangular area of alluvial deposits where a river divides before entering a larger body of water; " the Mississippi River delta"; " the Nile delta" 2: an object shaped like an equilateral triangle 3: the 4th letter of the Greek alphabetDelta \ Del" ta\, n.; pl. { Deltas}. [ Gr. de` lta, the name of the fourth letter of the Greek alphabet ( the capital form of which is [ Delta], Eng. D), from the Ph[ oe] nician name of the corresponding letter. The Greeks called the alluvial deposit at the mouth of the Nile, from its shape, the Delta of the Nile.] 1. The fourth letter of the Greek alphabet ([ Delta] [ delta]), corresponding to { D}. Hence, an object having the shape of the capital [ Delta]. [ Webster 1913 Suppl.] 2. A tract of land shaped like the letter delta ([ Delta]), especially when the land is alluvial and inclosed between two or more mouths of a river; as, the delta of the Ganges, of the Nile, or of the Mississippi. [ 1913 Webster] 3. ( Elec.) The closed figure produced by connecting three coils or circuits successively, end for end, esp. in a three- phase system; -- often used attributively, as delta winding, delta connection ( which see), etc. [ Webster 1913 Suppl.] 92 Moby Thesaurus words for " delta": V, alkali flat, alluvial plain, basin, bill, bottomland, branch, breakwater, bushveld, campo, cape, champaign, champaign country, chersonese, coastal plain, coral reef, crotch, crutch, desert, down, downs, fan, fell, flat, flat country, flatland, flats, foreland, fork, furcula, furculum, grass veld, grassland, groin, head, headland, heath, hook, inguen, lande, level, llano, lowland, lowlands, lunar mare, mare, mesa, mesilla, moor, moorland, mull, naze, ness, offshoot, open country, pampa, pampas, peneplain, peninsula, plain, plains, plateau, playa, point, prairie, promontory, prong, ramification, reef, salt flat, salt marsh, salt pan, sandspit, savanna, sebkha, spit, spur, stem, steppe, table, tableland, tongue, tree veld, trident, tundra, upland, vega, veld, weald, wide- open spaces, wishbone, wold1. A quantitative change, especially a small or incremental
one ( this use is general in physics and engineering). " I just
doubled the speed of my program!" " What was the delta on
program size?" " About 30 percent." ( He doubled the speed of
his program, but increased its size by only 30 percent.)
2. [ Unix] A { diff}, especially a { diff} stored under the set
of version- control tools called SCCS ( Source Code Control
System) or RCS ( Revision Control System). See { change
management}.
3. A small quantity, but not as small as { epsilon}. The
jargon usage of { delta} and { epsilon} stems from the
traditional use of these letters in mathematics for very small
numerical quantities, particularly in " epsilon- delta" proofs
in limit theory ( as in the differential calculus). The term
{ delta} is often used, once { epsilon} has been mentioned, to
mean a quantity that is slightly bigger than { epsilon} but
still very small. " The cost isn' t epsilon, but it' s delta"
means that the cost isn' t totally negligible, but it is
nevertheless very small. Common constructions include " within
delta of ---", " within epsilon of ---": that is, " close to"
and " even closer to".
[{ Jargon File}]
( 2000- 08- 02) Developing European Learning through Technology Advancedelta: n. 1. [ techspeak] A quantitative change, especially a small or incremental one ( this use is general in physics and engineering). “ I just doubled the speed of my program!” “ What was the delta on program size?” “ About 30 percent.” ( He doubled the speed of his program, but increased its size by only 30 percent.) Delta, CO -- U. S. city in Colorado Population ( 2000): 6400 Housing Units ( 2000): 2749 Land area ( 2000): 5. 318651 sq. miles ( 13. 775241 sq. km) Water area ( 2000): 0. 201126 sq. miles ( 0. 520914 sq. km) Total area ( 2000): 5. 519777 sq. miles ( 14. 296155 sq. km) FIPS code: 19850 Located within: Colorado ( CO), FIPS 08 Location: 38. 740879 N, 108. 063423 W ZIP Codes ( 1990): 81416 Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Delta, CO Delta
Delta, OH -- U. S. village in Ohio Population ( 2000): 2930 Housing Units ( 2000): 1193 Land area ( 2000): 2. 600604 sq. miles ( 6. 735532 sq. km) Water area ( 2000): 0. 000000 sq. miles ( 0. 000000 sq. km) Total area ( 2000): 2. 600604 sq. miles ( 6. 735532 sq. km) FIPS code: 21616 Located within: Ohio ( OH), FIPS 39 Location: 41. 575090 N, 84. 002477 W ZIP Codes ( 1990): 43515 Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Delta, OH Delta
Delta, PA -- U. S. borough in Pennsylvania Population ( 2000): 741 Housing Units ( 2000): 324 Land area ( 2000): 0. 266230 sq. miles ( 0. 689533 sq. km) Water area ( 2000): 0. 000000 sq. miles ( 0. 000000 sq. km) Total area ( 2000): 0. 266230 sq. miles ( 0. 689533 sq. km) FIPS code: 18800 Located within: Pennsylvania ( PA), FIPS 42 Location: 39. 727207 N, 76. 325668 W ZIP Codes ( 1990): 17314 Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Delta, PA Delta
Delta, IA -- U. S. city in Iowa Population ( 2000): 410 Housing Units ( 2000): 191 Land area ( 2000): 0. 998534 sq. miles ( 2. 586190 sq. km) Water area ( 2000): 0. 000000 sq. miles ( 0. 000000 sq. km) Total area ( 2000): 0. 998534 sq. miles ( 2. 586190 sq. km) FIPS code: 19855 Located within: Iowa ( IA), FIPS 19 Location: 41. 324112 N, 92. 329481 W ZIP Codes ( 1990): 52550 Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Delta, IA Delta
Delta, LA -- U. S. village in Louisiana Population ( 2000): 239 Housing Units ( 2000): 111 Land area ( 2000): 2. 978267 sq. miles ( 7. 713676 sq. km) Water area ( 2000): 0. 145765 sq. miles ( 0. 377530 sq. km) Total area ( 2000): 3. 124032 sq. miles ( 8. 091206 sq. km) FIPS code: 20330 Located within: Louisiana ( LA), FIPS 22 Location: 32. 321342 N, 90. 936544 W ZIP Codes ( 1990): Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Delta, LA Delta
Delta, UT -- U. S. city in Utah Population ( 2000): 3209 Housing Units ( 2000): 1106 Land area ( 2000): 3. 151247 sq. miles ( 8. 161691 sq. km) Water area ( 2000): 0. 000000 sq. miles ( 0. 000000 sq. km) Total area ( 2000): 3. 151247 sq. miles ( 8. 161691 sq. km) FIPS code: 18910 Located within: Utah ( UT), FIPS 49 Location: 39. 353145 N, 112. 573656 W ZIP Codes ( 1990): 84624 Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Delta, UT Delta
Delta, MO -- U. S. city in Missouri Population ( 2000): 517 Housing Units ( 2000): 222 Land area ( 2000): 0. 440008 sq. miles ( 1. 139616 sq. km) Water area ( 2000): 0. 000000 sq. miles ( 0. 000000 sq. km) Total area ( 2000): 0. 440008 sq. miles ( 1. 139616 sq. km) FIPS code: 19072 Located within: Missouri ( MO), FIPS 29 Location: 37. 197371 N, 89. 738757 W ZIP Codes ( 1990): 63744 Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Delta, MO Delta
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