The definition of a petal is the brightly colored outside part of a plant.(noun)
An example of a petal is one of the red parts on a rose bud.
See petal in Webster's New World College Dictionary
Origin: ModL petalum < ML(Ec), a thin metal plate < Gr petalon, leaf < petalos, outspread < IE base *pet-, to spread out > fathom
Origin: < ModL -petus (< L petere, to rush at, seek: see feather + -al
See petal in American Heritage Dictionary 4
Origin: New Latin petalum
Origin: , from Greek petalon, leaf; see petə- in Indo-European roots.
Origin: From New Latin -petus
Origin: , from Latin petere, to seek; see pet- in Indo-European roots.
Learn more about petal