IPA: /ˈrɪktəl/
KK: /ˈrɪktəl/
Relating to or resembling a rictus, which is a fixed grimace or grin, often associated with certain expressions or conditions.
The rictal expression on the actor's face conveyed a sense of horror.
Rictal is derived from the Latin root "rictus" (meaning open mouth or gaping). The suffix "-al" (meaning pertaining to) indicates a relation to the root. Therefore, "rictal" refers to something pertaining to an open mouth or gaping expression.
Think of 'rictus' as relating to an 'open mouth' — that's why 'rictal' means something that pertains to an open mouth.