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View synonyms for delta
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.
- Delta, Astronomy. 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
, Military.
- 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/ dɛlˈteɪɪk; ˈdɛltə /
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
2/ ˈdɛltə /
noun
- a state of Nigeria, on the Niger river delta on the Gulf of Guinea. Capital: Asaba. Pop: 4 098 391 (2006). Area: 17 698 sq km (6833 sq miles)
Delta
3/ ˈdɛltə /
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
/ dĕl′tə /
- 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.
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Derived Forms
- deltaic, adjective
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Word History and Origins
Origin of delta1
First recorded in 1150–1200; Middle English delta, deltha, from Latin delta, from Greek délta; akin to Hebrew dāleth
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Word History and Origins
Origin of delta1
C16: via Latin from Greek, of Semitic origin; compare Hebrew dāleth
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