Wiktionary
Usage examples of "orbicularis".
When a normal person, some normal innocent person who sure as hell deserved a lot better, when she comes home from waiting tables all day and finds her husband suffocated in the family car, his bladder leaking, and she screams, this is simply her orbicularis oris stretched to the very limit.
This is your triangularis muscle pulling down the corners of your orbicularis oris muscle.
The orbicularis oris muscles around his lips clamp his mouth into a thin straight line.