tibia
tib.ia \'tib-e--*\ \-e--.e-, -e--.i-\ \-e--*l\ n or tib.i.ae also tib.i.as [L] pl 1a: the inner and usu. larger of the two bones of the vertebrate hind limb between the knee and ankle 1b: the fourth joint of the leg of an insect between the femur and tarsus 2: an ancient flute orig. fashioned from an animal's leg bone - tib.i.al aj