gracile

adjective3

1. •
   Lean, slender, thin.

   • Maxillary palpi shorter than the antennae, the terminal joint small, gracile, subulated; [...] — 1829
2. •
   Of an animal or skeletal element: having a slender frame.
3. •
   Graceful or gracefully slender.

   • [A] band of dancers run upon the stage and perform a sylvan dance with gracile wavings of branches or the clinking of cymbals. — 1908