phasotropy
/fæsɒˈtrɒpi/Definitions
1. noun
The phenomenon of a person’s physical appearance changing to match the emotions or attitudes of those around them.
“The crowd’s phasotropy was evident in the way everyone’s facial expressions synchronized with the news being announced.”
2. noun
A change in physical appearance or behavior that reflects the emotions or attitudes of others, often seen in groups or crowds.
“The sudden shift in the crowd’s mood led to a visible phasotropy, with their demeanor changing in unison.”