'corolla' originates from Latin, specifically the word 'corōlla', where 'corōna' meant 'crown' and the diminutive suffix '-ella' meant 'little'.

'corolla' changed from the Latin word 'corōlla' (a diminutive of 'corōna') used in Medieval/Late Latin and entered English via scientific/ botanical Latin, becoming the modern English 'corolla'.

Initially, it meant 'little crown' in Latin; over time it evolved into the botanical sense of 'the whorl of petals of a flower' (a crownlike arrangement) and later acquired other extended uses (e.g., as a car model name).