self-acting

English

Etymology

From 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).