凸透镜 tūtòujìng convex lens Definitions Defs Origin Strokes Stroke Words Sentences Sents 凸 tū verb protruding to stick out or protrude; convex; describes a male connector. This is the opposite of 凹 āo.透镜 透鏡 tòujìng lens An optical component made of transparent material like glass or crystal that refracts light; usually classified into 凸透镜 tūtòujìng and 凹透镜 āotòujìng
