Definition of tibia in English:


nounPlural tibiae

  • 1The inner and typically larger of the two bones between the knee and the ankle (or the equivalent joints in other terrestrial vertebrates), parallel with the fibula.

    • ‘The cause of Blount disease is unknown, but it causes abnormal growth at the top of the tibia bone by the knee joint.’
    • ‘X-rays later revealed that both the tibia and fibula bones in Marcus's right leg fractured.’
    • ‘The kneecap is then moved across to the outer side of the knee to expose the knee joint behind it, between the tibia (shin bone) and the femur (thigh bone).’
    • ‘Bruce Latimer, director of the Cleveland Museum of Natural History in Ohio, said an ankle bone and tibia discovered at the site proves the creature walked upright.’
    • ‘Miss Rowley, 29, broke her tibia and fibula bones and underwent two operations which resulted in her left leg being half an inch shorter than the right.’
    • ‘However, as a 4 year old he had a fractured tibia and fibula.’
    • ‘The earliest members of the group had two separate leg bones, the tibia and fibula, just like humans.’
    1. 1.1Zoology The tibiotarsus of a bird.
      • ‘The crest is the round disc of bone attached to the upper part of the tibia that acts as a kind of lever for the bird's movement.’
      • ‘The left tibia was removed from each bird, cleaned, and marked for identification.’
      • ‘A bird with a broken tibia popped off her own cast after a week.’
      • ‘The bird's tibia (lower leg bone) has been fused with some of the upper bones of the foot to form the tibiotarsus.’
      • ‘Severely affected birds may have a marked bowing of the tibia, be reluctant to move, and have a stilted gait.’
    2. 1.2Entomology The fourth segment of the leg of an insect, between the femur and the tarsus.
      • ‘Both sexes have a pair of ‘spurs’ on each hind leg where the tibia, or fourth leg segment, joins the tarsus, or foot.’
      • ‘The claw is closeable over its entire length and the prey is fixed between the femur (upper arm) and the tibia (lower arm) of the insect leg.’
      • ‘In addition to the pretarsus, tarsus, tibia and femur, insects have two proximal (closer to the body) segments not shown in the figure.’
      • ‘The second segment, or tibia, is also long, and in most species is equipped with a line of wicked barbs pointing outward.’
      • ‘The femur-tibia (FT) feedback system of the stick insect is one of the best known motion feedback systems in arthropods.’


Late Middle English: from Latin, ‘shin bone’.