noun
- laughter or a laugh
Usage: medical/scientific; formal
Examples
- The patient exhibited uncontrollable risus during the neurological examination.
- Risus sardonicus is a medical term describing a fixed grin caused by muscle spasms.
- The doctor noted episodes of inappropriate risus in his clinical notes.
- Ancient texts often described risus as a sign of divine madness.
- The researcher studied the neurological basis of pathological risus.