Keyer

adj, noun

Definitions

Adjective
  1. 1
    comparative form of key: more key comparative, form-of
Noun
  1. 1
    One who, or that which, keys.
  2. 2
    A device for signalling by pressing keys or switches.
  3. 3
    A device that replaces a fixed colour in the image with some other picture or background; chromakeyer.

Etymology

From key + -er.

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