noun🔗ShareAn outermost-but-one whorl of a flower, composed of petals, when it is not the same in appearance as the outermost whorl (the calyx); it usually comprises the petal, which may be fused."The rose's vibrant red corolla of delicate petals surrounded its inner reproductive parts, contrasting sharply with the green sepals of its calyx. "plantbiologypartnatureorganismChat with AIVocabulary GamePractice Reading
