skullcap

noun5

1. •
   A small domed cap that covers the area from the forehead to just above the back of the neck.

   • The French government in 2004 banned “conspicuous” religious symbols including Muslim headscarves, Jewish skullcaps and large Christian crosses from French schools. — 2022
2. •
   A yarmulke-like hat.
3. •
   Any of several species of flowering plants of the genus Scutellaria, in the Lamiaceae family.
4. •
   The calvaria, the top part of the skull, covering the cranial cavity containing the brain.
5. •
   (historical) A torture device for compressing the skull.