The word 'tibia' is correct and usable in written English.
It is a noun that refers to the inner and typically larger of the two bones between the knee and the ankle in humans. It is also commonly used in anatomy and biology to describe a similar bone structure in animals. Example: The athlete fractured their tibia during the game and had to undergo surgery to repair it.
On the way down, I see a red-tailed bumblebee flitting between the bluebells, gathering pollen on its tiny tibia with the focus of a craftsman.
As an orthopaedic surgeon, however, I found it most interesting that you thought the Vikings had a "tibula" instead of the tibia and fibula that are found in modern humans.
Not often does a young man's tibia break clean through his skin in the course of a college basketball game.
It stretches across and attaches to the iliotibial tract, a band of fibrous tissue extending from the ilium to the tibia (shinbone), and to the upper portion of the femur (thighbone).
The articulation of one of the tarsal bones, the ankle bone (talus, or astragalus), with the fibula and tibia of the lower leg forms the actual ankle joint, although the general region is often called the ankle.
In humans the tibia forms the lower half of the knee joint above and the inner protuberance of the ankle below.
At the lower end of the tibia there is a medial extension (the medial malleolus), which forms part of the ankle joint and articulates with the talus (anklebone) below; there is also a fibular notch, which meets the lower end of the shaft of the fibula.
The rounded ends of the tibia move forward and backward on the corresponding ends of the femur; the kneecap, or patella, rests upon the ends of the femur and serves to prevent the tibia from moving too far forward when the leg is bent.
The femur and the tibia are held together at the joint by a complex system of ligaments that run from the condyles of one bone to the condyles of the other.
Other similarities include the reduction or loss of the outer two fingers, long end joints of the fingers, and a straplike fibula attached to a crest on the side of the tibia.
The bone of the heel, directed downward and backward, is the calcaneus, while the "keystone" of the tarsus is the talus, the superior surface of which articulates with the tibia.
