part of the perianth that is usually brightly colored
"She gently plucked a bright red petal from the rose to use as a bookmark."
One of the component parts of the corolla of a flower. It applies particularly, but not necessarily only, when the corolla consists of separate parts, that is when the petals are not connately fused. Petals are often brightly colored.
"She carefully plucked a single bright yellow petal from the daisy to add to her pressed flower collection."
To spread out from, like the petals of a flower
"The crowd began to part as they moved away from the stage in a wide circle."