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delta noun

  /ˈdɛltə/ , [ˈdɛɫtə]
  • The fourth letter of the modern Greek alphabet Δ, δ.
  • A landform at the mouth of a river where it empties into a body of water.
  • (mathematics, physics, engineering) The symbol Δ; A change in a quantity, likely from "d" for "difference".
 delta
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