gracile

Lean, slender, thin.

[T]hoſe Trees that are called Firs by the Vulgar (from their near conformity and likeneſs to that Tree) are well known by all Learned Men (by the Redneſs, the Roſinous Nature of the Wood, the Gracil Cones hanging downwards, &c.) to be the true Pitch-Tree, of which there are ſuch great plenty in Norway, Sweden, and other Countries of the North, [...]

Maxillary palpi shorter than the antennæ, the terminal joint small, gracile, subulated; [...]

Of an animal or skeletal element: having a slender frame.

This tentative comparison, plus consideration of individual skulls, shows the Neolithic pre-Greeks more Mediterranean than the Greeks, with emphasis on intermediate or gracile Mediterranean rather more than on the rugged Basic White trend, [...]

Where stratified fossil sequences are known, "gracile" fossils precede robust ones. The extremely robust hominids do not appear on the scene until about 2 million years ago, followed shortly thereafter by an "advanced" gracile. Both the advanced gracile and robust forms probably evolved from earlier gracile australopithecines.

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.

Then Herr Spinnell turned his back and got away from there. Followed by the jubliations of the little Klŏterjahn, holding his arm in a certain cautious and stiffly gracile manner, he walked over the gravel with the vehement, yet hesitating steps of one who seeks to hide the fact that he is—inwardly—on the run.