plume
/ˈpljuːm//ˈplum/noun
Definitions
A feather of a bird, especially a large or showy one used as a decoration.
A cluster of feathers worn as an ornament, especially on a helmet; a hackle.
A token of honour or prowess; that on which one prides oneself; a prize or reward.
Synonyms:feather in one's capThe vane of a feather, especially when on a quill pen or the fletching of an arrow.