(heraldry) in medieval times, an emblem used to decorate a helmet(noun.artifact)
source: wordnet30
a showy growth of e.g. feathers or skin on the head of a bird or other animal(noun.animal)
source: wordnet30
A tuft, or other excrescence or natural ornament, growing on an animal's head; the comb of a cock; the swelling on the head of a serpent; the lengthened feathers of the crown or nape of bird, etc.(noun)