Top 1000 Chinese words 800 - 851

it is also a measure word for certain machineries, such as 电脑 (computer)

周 indicates the "week" in general, but to say the days of the week (Monday, ... Saturday), it is enough to add the numbers from one (一) to 6 (六) after 周. Ex.:周一 (Monday), 周三 (Wednesday). How to say Sunday? 周日 (No number here!)

If you analyse the word, you can observe that it is formed by 实验 (experiment) + 室 (room), hence it indicates a room where experiments are made.