'unicornuous' originates from Latin, specifically the word 'unicornis,' where 'uni-' meant 'one' and 'cornu' meant 'horn.'

'unicornis' transformed into the English word 'unicorn,' and eventually became the modern English word 'unicornuous' to describe something resembling a unicorn.

Initially, it meant 'having one horn,' but over time it evolved into its current meaning of 'resembling or pertaining to a unicorn.'