yarmulke

/ˈjɑrməkə/
noun
  1. A small, round skullcap worn by Jewish men and boys, especially during prayer or religious ceremonies.
    • The rabbi adjusted his yarmulke before beginning the service.
    • He wore a velvet yarmulke to his nephew's bar mitzvah.
    • Many Jewish men keep a yarmulke in their car for synagogue visits.
Synonyms