'acinaciform' originates from Latin, specifically the word 'acinaces,' where 'acinac-' meant 'scimitar' and '-form' meant 'shape or form.'

'acinaces' transformed into the English word 'acinaciform' to describe objects shaped like a scimitar.

Initially, it meant 'shaped like a scimitar,' and this meaning has largely remained the same in modern usage.