Etymology

preimage

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Today it means: For a given function, the set of all elements of the domain that are mapped into a given subset of the codomain; (formally) given a function ƒ : X → Y and a subset B ⊆ Y, the set ƒ⁻¹(B) = {x ∈ X : ƒ(x) ∈ B}. Full definition →

English image ← Middle English pre- ← Latin prae-
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The story

  1. Proto-Indo-European*per-
  2. Proto-Indo-European*preh₂-
  3. Proto-Indo-European*préh₂i?
  4. Proto-Italic*prai
  5. Proto-Italic*prai-
  6. Latinprae-
  7. Middle Englishpre-
  8. Englishpre-
  9. Englishimage
  10. English todaypreimage

From pre- + image.

Etymology from Wiktionary, CC BY-SA 4.0.