Latin for both shinbone and flute — because Romans carved flutes from the hollow leg bones of animals
The larger of the two bones in the lower leg, running from the knee to the ankle; the shinbone
From Latin 'tibia' meaning shinbone, but also meaning a flute or pipe. The dual meaning arose because ancient Romans made flutes from the hollow shinbones of animals, particularly birds and deer. The bone and the instrument shared a name because they shared a physical form — long, hollow, and cylindrical. The musical sense was actually more common in classical Latin; the anatomical use was formalized later in medical terminology. Key
In classical Rome, tibia primarily meant a musical instrument — a double-piped flute played at religious ceremonies, theatrical performances, and funerals. The tibicen (tibia player) was an important figure in Roman public life. The anatomical meaning was secondary until modern medicine claimed the word exclusively for the bone.