'acalicular' originates from Latin, specifically the word 'caliculus,' where 'a-' meant 'without' and 'caliculus' meant 'small cup or calyx.'

'caliculus' transformed into the English word 'calicle,' and eventually became the modern English word 'acalicular' through the addition of the prefix 'a-' to denote absence.

Initially, it meant 'without a small cup or calyx,' and this meaning has largely remained the same in modern usage.