The Chinese word 剂量 (jìliàng) is formed by logically combining two conceptual building blocks: the first character 剂 means "agent" or "preparation", specifically referring to a medicinal or chemical substance. The second character 量 means "measurement" or "quantity". By joining them, the compound directly and pictorially represents the core idea of "the measured quantity of an agent", effectively creating the meaning for "dosage".