frill

nouns

(paleontology) a bony plate that curves upward behind the skull of many ceratopsian dinosaurs
domain category
the earth science that studies fossil organisms and related remains
is a type of (narrower)
any flat platelike body structure or part
an external body part consisting of feathers or hair about the neck of a bird or other animal
a strip of pleated material used as a decoration or a trim
is derived from
ornamental objects of no great value