ric·tus /ˈrɪktəs/([复] -tus 或 -tus·es) n. 1. (鸟类的)嘴裂；喙裂；(鸟等)张嘴宽距 2. (人在惊愕、疼痛等时的)龇牙咧嘴 the rictus of death 死亡时龇牙咧嘴的怪相 He sat quietly, his mouth a rictus. 他张口结舌，哑寂无声地坐着。 Her face contorted into a rictus of pain. 她的脸因疼痛而扭曲成一副张口蹙眉的怪相 [NL < L: open mouth < ringī to gape]