Sylph (noun)

1. An imaginary or mythical being resembling a slender beautiful young woman.
2. A slender graceful woman or girl.

Origin:

From french sylphe, from latin sylphus, from greek sylphis, from sylphos ("a wood spirit"), from sylphē ("a wood nymph").

Examples:

1. She was as light and graceful as a sylph.
2. The sylph danced gracefully across the stage.
3. The sylphs are said to live in the forest.
4. The sylph glided through the air.
5. The sylphs were known for their beauty.