English edit

Etymology edit

self- +‎ motion

Noun edit

self-motion (countable and uncountable, plural self-motions)

  1. Motion given by inherent powers, without external impulse.

References edit

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