(1):

(n.) A musical instrument of the flute kind, originally made of the leg bone of an animal.

(2):

(n.) The inner, or preaxial, and usually the larger, of the two bones of the leg or hind limb below the knee.

(3):

(n.) The fourth joint of the leg of an insect. See Illust. under Coleoptera, and under Hexapoda.