The Spanish word 'tibial' comes from combining the Latin word 'tibia', meaning 'shin bone' or 'flute', with the Latin suffix '-al', meaning 'relating to'. The Latin word 'tibia' originally referred both to the shin bone and to an ancient Roman flute, likely because early flutes were sometimes made from hollow animal bones. When combined with the suffix '-al', it forms 'tibial', meaning 'relating to the tibia' or 'pertaining to the shin bone'.

A simpler related Spanish word is 'tibia', which directly refers to the shin bone. This maintains the same anatomical meaning as its Latin ancestor, though it has lost the musical instrument meaning over time.

English speakers might recognize the cognate word 'tibial', which has the same meaning and etymology as the Spanish word. The English word 'tibia' is also related, coming from the same Latin root. These anatomical terms are very similar across many modern languages because they derive from standardized medical Latin terminology.