Pharmaceutical term — a solid medication that melts on insertion. Common subtypes:
退烧栓 (tuìshāoshuān, fever suppository, often given to small children),
肛门栓 (gāngménshuān, anal suppository). The pattern <route/purpose>+
剂 names dosage forms:
注射剂 (injection),
片剂 (tablet),
胶囊剂 (capsule).
