Corolla/kəˈrəʊlə,kəˈrɑːlə/ Definition 1 of 2Pro Tip 1/3Botanical Term Corolla is specifically used in botany to describe a flower part. Biologists study the corolla's structure to identify different flowers. Pro Tip 2/3Visual Imagery Use 'corolla' to create a vivid image of a flower in the reader's mind. The sunflower's large corolla turned towards the sun. Pro Tip 3/3Not Just Color 'Corolla' refers to all petals, not just the colorful ones. The white corolla of the daisy contrasts with its yellow center.