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delta
1[del-tuh]
noun
the fourth letter of the Greek alphabet (Δ, δ).
the consonant sound represented by this letter.
the fourth in a series of items.
anything triangular, like the Greek capital delta (Δ).
Mathematics.an incremental change in a variable, as Δ or δ.
a nearly flat plain of alluvial deposit between diverging branches of the mouth of a river, often, though not necessarily, triangular.
the Nile delta.
Also Delta a word used in communications to represent the letter D.
Astronomy.Delta, a star that is usually the fourth brightest of a constellation.
The fourth brightest star in the Southern Cross is Delta Crucis.
Delta
2[del-tuh]
noun
the NATO name for a class of nuclear-powered submarines armed with multiple-warhead ballistic missiles, including those designed to strike military and industrial installations: first produced for the Soviet Navy in the 1970s; in service with the Russian Navy since 1992.
Delta
1/ ˈɛə /
noun
(foll by the genitive case of a specified constellation) usually the fourth brightest star in a constellation
any of a group of US launch vehicles used to put unmanned satellites into orbit
communications a code word for the letter d
Delta
2/ ˈɛə /
noun
a state of Nigeria, on the Niger river delta on the Gulf of Guinea. Capital: Asaba. Pop: 4098391 (2006). Area: 17698 sq km (6833 sq miles)
delta
3/ dɛlˈteɪɪk, ˈɛə /
noun
the fourth letter in the Greek alphabet (Δ, δ), a consonant transliterated as d
an object resembling a capital delta in shape
(capital when part of name) the flat alluvial area at the mouth of some rivers where the mainstream splits up into several distributaries
the Mississippi Delta
maths a finite increment in a variable
delta
A usually triangular mass of sediment, especially silt and sand, deposited at the mouth of a river. Deltas form when a river flows into a body of standing water, such as a sea or lake, and deposits large quantities of sediment. They are usually crossed by numerous streams and channels and have exposed as well as submerged areas.
Other Word Forms
- deltaic adjective
Word History and Origins
Origin of delta1
Word History and Origins
Origin of delta1
Example Sentences
Opponents, including agencies in the delta and environmental advocates, say the project is an expensive boondoggle that would harm the environment and communities, and that the state should pursue other alternatives.
The delta smelt was bound for extinction years ago, but it’s still a red flag signifying political ignorance on the right.
State and federal water both flow from dams and rivers into the delta, where roughly 5 million acre-feet annually is pumped south through canals into the San Joaquin Valley, Central Coast and Southern California.
It was 16 years ago, in the unforgiving Sundarbans - a vast, harsh delta of 100 islands in India's West Bengal state.
But when his administration adopted water rules that weakened environmental protections in the delta, the state and conservation groups successfully challenged the changes in court.
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