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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 alphabet

Delta \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, wold

1. 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 Advance

delta: 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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