frill

(noun) (paleontology) a bony plate that curves upward behind the skull of many ceratopsian dinosaurs.

(noun) an external body part consisting of feathers or hair about the neck of a bird or other animal. Synonyms: ruff.

(noun) a strip of pleated material used as a decoration or a trim. Synonyms: flounce, ruffle, furbelow.

(noun) ornamental objects of no great value. Synonyms: folderal, falderol, gimcrackery, gimcrack, nonsense, trumpery.