A classroom or lab in a school where science (science experiments and observations) is carried out; usually equipped with apparatus, chemicals, and observation tools.
今日の授業は理科室で実験を行います。
Today's class will do an experiment in the science room.
理科室の備品は授業のたびに先生が点検している。
The teacher checks the science room's equipment before each lesson.
放課後、理科室で顕微鏡を使って観察した。
After school, I used a microscope in the science room to observe samples.