The word 'talon' entered English in the late 14th century from Old French, where it meant 'heel' or, by extension, the claw of a bird of prey. The Old French term derived from the Medieval Latin 'talo' (genitive 'talonis'), meaning 'ankle' or 'heel', which itself came from the Latin 'talus', referring to the ankle or anklebone. The semantic evolution from 'heel' or 'ankle' to 'claw' is a metaphorical shift, drawing a parallel between the joint and grasping function of a heel/ankle and the hooked, grasping nature of a raptor's claw. This journey from a Latin anatomical term to a specific English zoological feature illustrates a classic path of meaning specialization via French mediation.

The word is a simplex loanword from French. It cannot be meaningfully segmented into productive morphemes within modern English spelling.