丝膜
Armilla \Ar*mil"la\, n.; pl. E. {Armillas}, L. {Armill[ae]}. [L., a bracelet.] 1. An armil. 2. (Zo["o]l.) A ring of hair or feathers on the legs.
armilla n 1: a celestial globe consisting of metal hoops; used by early astronomers to determine the positions of stars [syn: {armillary sphere}] 2: (archeology) a bracelet worn around the wrist or arm