tibia

American Heritage® Dictionary of the English Language, Fourth Edition

1. n. The inner and larger of the two bones of the lower human leg, extending from the knee to the ankle.
2. n. A corresponding bone in other vertebrates. Also called shinbone.
3. n. The fourth division of an insect's leg, between the femur and the tarsi.
4. n. Music An ancient flute.

Century Dictionary and Cyclopedia

1. n. In organ-building, a stop of the open diapason species, with pipes of an exceptionally broad scale, giving a full, powerful tone. Different varieties are known by specific names, as tibia plena, tibia profonda, etc.
2. n. In anatomy and zoology, the inner and usually the larger of the two bones of the crus, or lower leg, extending from the knee to the ankle; the shin-bone of man. This is of prismatic section, with a greatly expanded head which articulates with the femur to the exclusion of the fibula, and a process at the foot which forms the inner malleolus of the ankle. The tibia forms the ankle-joint in all mammals which have one, with or without the fibula, by articulation with the astragalus. In many cases it appears to be the only bone of the lower leg, the fibula being shortened and partly aborted, or even completely ankylosed with the tibia. Much of the tibia is subcutaneous in man, and the character of the broad face and sharp edge of its prismatic section has an ethnological significance. See platycnemic., and cuts under crus, digitigrade, Equidæ, fibula, Ornithoscelida, Plantigrada, Plesiosaurus, tarsus, and skeleton, with several others cited under the last-named word.
3. n. In ornithology, the tibiotarsus. In some birds, as the loon, the tibia develops an immense apophysis which projects far above the knee-joint. See also cuts under Dromæus and tibiotarsus.
4. n. That segment of the hind limb which extends from the knee to the ankle; the part of the leg corresponding to the extent of the tibia; the crus; the drumstick of a fowl: used especially in ornithology.
5. n. In entomology, the fourth and penultimate joint of the leg, between the femur and the tarsus. It is often enlarged, as in saltatorial forms, especially in connection with such in-crassate femora as those of grasshoppers, etc. See cuts under corbiculum and coxa.
6. n. An ancient variety of flageolet, or direct flute, single or double. See flute, 1 .

Wiktionary

1. n. The inner and usually the larger of the two bones of the leg or hind limb below the knee.
2. n. A segment of an insect's leg.

GNU Webster's 1913

1. n. The inner, or preaxial, and usually the larger, of the two bones of the leg or hind limb below the knee.
2. n. The fourth joint of the leg of an insect. See Illust. under Coleoptera, and under Hexapoda.
3. n. A musical instrument of the flute kind, originally made of the leg bone of an animal.

WordNet 3.0

1. n. the inner and thicker of the two bones of the human leg between the knee and ankle