microscopic
adjective uk/ˌmaɪ.krəˈskɒp.ɪk/ us/ˌmaɪ.krəˈskɑː.pɪk/
science specialized极小的;需要用显微镜才可看见的
very small and only able to be seen with a microscope
microscopic algae 只有在显微镜下才看得见的藻类
science informal humorous, specialized极小的，微小的
extremely small
The helpings you get in the cafeteria are microscopic! 公司餐厅供应的饭菜就那么一点点儿！