projector

Etymology

Partly from Latin projector (“person who throws away”); partly directly from project + -or.

noun

  1. Someone who devises or suggests a project; a proposer or planner of something.
    [A]s the Doctor neither did this, nor yet sent him an answer, the projector wrote a second letter […]. 1791, Thomas Paine, Rights of Man
  2. An optical device that projects a beam of light, especially one used to project an image (or moving images) onto a screen.
  3. (psychology) One who projects, or ascribes his/her own feelings to others.
    Projectors attempt to get rid of unwanted feelings, only it does not work; they still experience the unwanted feelings […] 1982, The Gestalt Journal, volume 5, page 44
  4. (mathematics) An operator that forms a projection.

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