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  1. Oxford Dictionary

    delta

    • IPA[ˈdɛltə]

    英式

    • n.
      the fourth letter of the Greek alphabet (Δ, δ), transliterated as ‘d’.；a fourth-class mark given for an essay, examination paper, or other piece of work.
    • symbol
      variation of a variable or function.；a finite increment.

    • noun: delta, plural noun: deltas

    • 釋義
    • 相關詞

    名詞

    • 1. the fourth letter of the Greek alphabet (Δ, δ), transliterated as ‘d’.
    • ▪ British a fourth-class mark given for an essay, examination paper, or other piece of work.
    • ▪ the fourth in a series of items, categories, etc. delta hepatitis
    • ▪ the fourth (usually fourth-brightest) star in a constellation Delta Cephei
    • 2. a code word representing the letter D, used in radio communication.
    • 3. a difference between two things or values there's a delta between perception and reality as long as the price delta is not too great, consumers can be sold on specs and future-proofing
    • ▪ a change or set of changes made to a file or program, especially as part of an update to a later version this approach saves disk space by storing only data deltas updates will be delivered as delta updates instead of complete application downloads

    symbol

    • 1. variation of a variable or function.
    • 2. a finite increment.
    • 3. the discriminant of a quadratic equation.
    • 4. declination.

    delta-v

    • n.
      acceleration: four hundred knots of delta-v

    Oxford American Dictionary

    delta rhythm

    • n.
      electrical activity of the brain at a frequency of around 1–8 Hz, typical of sleep. The ...

    Oxford American Dictionary

    delta wing

    • n.
      a single triangular swept-back wing fitted on some jet aircraft.

    Oxford Dictionary

    Delta Force

    • ph.
      an elite US Army unit whose main responsibilities are rescue operations and special forces work.

    Oxford American Dictionary

    delta rhythm

    • n.
      electrical activity of the brain at a frequency of around 1–8 Hz, typical of sleep. The ...

    Oxford Dictionary

    Delta Force

    • ph.
      an elite American military force whose main responsibilities are rescue operations and special ...

    Oxford Dictionary

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    delta

    • IPA[ˈdeltə]

    美式

    • n.
      the fourth letter of the Greek alphabet (Δ, δ), transliterated as ‘d’.
    • symbol
      variation of a variable or function.

    Oxford American Dictionary

    delta

    • IPA[ˈdeltə]

    美式

    • n.
      a triangular tract of sediment deposited at the mouth of a river, typically where it diverges ... the Nile delta a huge delta system developed

    Oxford American Dictionary

    delta

    • IPA[ˈdɛltə]

    英式

    • n.
      a triangular tract of sediment deposited at the mouth of a river, typically where it diverges ... the Nile delta a huge delta system developed

    Oxford Dictionary