儿科
ér kē · HSK 6
pediatrics
👶🩺 儿 (child) + 科 (branch/department) = children's medical department
儿 means child and 科 means a branch of study or department, so 儿科 literally reads as the children's department — the medical specialty for kids, i.e. pediatrics.
科 — grain 禾 + measure 斗
科 combines 禾 (grain) and 斗 (a dipper/measure), originally depicting the act of measuring or grading grain. From this, it extended to mean classification, category, and branch of study. Today it commonly appears in words for science (科学) and academic disciplines.