tibia

noun
  1. The inner and typically larger of the two bones between the knee and the ankle in vertebrates, parallel with the fibula. noun
    The athlete suffered a fracture in his tibia during the game.
    Doctors often use metal rods to stabilize a broken tibia.
  2. The fourth segment of the leg of an insect, situated between the femur and the tarsus. noun
    The insect's tibia is adapted for jumping and is quite powerful.
    Entomologists study the tibia to understand how insects move.