- able to be extended or protruded: protractile muscle
WordReference Random House Unabridged Dictionary of American English © 2026
pro•trac•tile
(prō trak′til, -tīl, prə-),USA pronunciation adj.
pro′trac•til′i•ty, n.
- Anatomycapable of being protracted, lengthened, or protruded.
- protract + -ile 1820–30
Collins Concise English Dictionary © HarperCollins Publishers::
protractile /prəˈtræktaɪl/, (less commonly) protractible adj