The Collaborative International Dictionary
Tibiotarsi
Tibiotarsus \Tib`i*o*tar"sus\, n.; pl. Tibiotarsi. (Anat.) The large bone between the femur and tarsometatarsus in the leg of a bird. It is formed by the union of the proximal part of the tarsus with the tibia.
Wiktionary
tibiotarsi
n. (plural of tibiotarsus English)