RICTUS Meaning of RICTUS in English [ 'rɪktəs ]■ noun a fixed grimace or grin.Derivativesrictal adjective OriginC19: from L., lit. 'open mouth', from rict- , ringi 'to gape'. Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004