眼底镜 yǎndǐjìng ophthalmoscope Definitions Defs Origin Strokes Stroke Words Sentences Sents 眼底 yǎndǐ fundus The back part of the inside of the eye, including the retina and optic nerve镜 鏡 jìng nounverb lens (bound form) lens; an optical tool used to correct vision, take photographs, or perform experiments