I have to translate the word 'stirrup' into Latin. Since the Romans (famously) rode without stirrups I can find no useful classical reference and have decided to use stapes, which is used by physicians to describe the smallest bone in the human body (in the ear).
The bone is exactly of the right shape. Does anyone know the origin of this word? Or has any opinion or advice on its declension? My instinct is for 3rd Decl., gen. stapitis, rather than 5th, gen stapei.