frill

1. (figurative) A substance or material on the edge of something, resembling such a strip of fabric.Examples: "Nothing moved in sky, land, or sea, except a frill of milkwhite foam along the nearer angles of the shore, shreds of which licked the contiguous stones like tongues."; "She had noticed yesterday that a few tiny corkscrew tendrils had come right through some cracks in the scullery ceiling and all the windows of the lean-to had a thick frill of ruffled green."; "[T]he bright frills of the winter fungi on the blotched trunks of the trees;"figuratively

2. (photography) A wrinkled edge to a film.

3. (figurative) Something extraneous or not essential; something purely for show or effect; a luxury.Examples: "My name is Sammy Carleton. Not ‘Mr.’ Carleton, but just plain Sammy. I’m a regular no-nonsense man with no fancy frills about me. I want you to call me Sammy."; "Every possible economy was carefully investigated and unnecessary expense, however small, eliminated. The company had no money to spare on "frills.""; "Falling in love, I said. Falling into it, we all did then, one way or another. How could he have made such light of it? Sneered even. As if it was trivial for us, a frill, a whim."figuratively

4. (zoology) The relatively extensive margin seen on the back of the heads of reptiles, with either a bony support or a cartilaginous one.Examples: "A large admiral lizard leapt up on a rail, stood on hind legs with fore legs raised like hands and watched for a moment […], then loped down the cess-path with arms swinging and iridescent frill flying out like a cape […]"; "She reminded Bojan of a desert lizard throwing up its frill to frighten predators."Synonyms: neck frill

5. (mycology) Synonym of armilla.Synonyms: armilla