self-acting

English

Etymology

self- +‎ acting

Adjective

self-acting (not comparable)

  1. Acting of or by itself.
    • 1947 May and June, “Notes and News: The Fordell Railway”, in Railway Magazine, page 188:
      On this railway there were three inclined planes of the self-acting type, the full wagons pulling up the empty.

References
  • Ogilvie, John. The Imperial Dictionary of the English Language: A Complete Encyclopedic Lexicon, Literary, Scientific, and Technological. Blackie & Son. (1884).
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