iris dilator muscle (plural iris dilator muscles) A muscle of the eye, serving to dilate the iris. dilator muscle: 開(kāi)肌; 擴(kuò)張肌, 開(kāi)大肌dilator muscle of naris: 鼻孔開(kāi)大肌dilator muscle of nose: 鼻孔開(kāi)大肌,鼻肌翼部dilator muscle of pupil: 虹膜擴(kuò)大肌; 瞳孔放大肌; 瞳孔開(kāi)大肌; 瞳孔擴(kuò)大肌dilator muscle of spiracle: 氣門(mén)開(kāi)肌下載手機(jī)詞典可隨時(shí)隨地查詞查翻譯