That ~ would be a tilde or a swung dash.
Disconformity.
Wavy layers in rock deposits form due to folding, which occurs under high pressure and high temperatures. The rock layers bend and create the wavy appearance. Not sure if that is what you're looking for Wavy layers can also simply be a bedform within sedimentary rocks - these are called wavy bedding or wavy lamination.
Scallop shell
The wavy mark over an n is called a tilde. It is often used in languages like Spanish and Portuguese to indicate pronunciation.
type wave: then your text here
Fusili? Or possibly lasagna noodles.
Useful Wavy Long Beautiful Amazing
Sutures are immovable, wavy joints between the bones of skull.
Wavy is correct.
Curly hair is also called wavy hair, frizzy hair, or crimpy hair.
If you are referring to wavy hair, or a wavy line, it is "ondulé/-e."
The wavy bladed Malaysian dagger is called a Kris or Keris.