noun
Refers to natural sciences and related fields such as mathematics, engineering, and medicine. Often contrasted with 文科 (liberal arts).
See also: 文科
彼は理科系の大学に進学した。
He entered a university in the sciences.
noun
science faculty; science department
Used for university faculties or departments covering science, engineering, medicine, etc.
In the science faculty, experiments are emphasized.
noun
Specifically the school subject covering physics, chemistry, biology, and earth science. Commonly taught in elementary and junior high school.
小学生のとき、理科の実験が一番好きだった。
When I was in elementary school, I liked science experiments the most.