载体
zài tǐ · HSK 7
vehicle or medium
🚚🧪 载 carry/load + 体 body = a carrying-body, the medium that carries something
载 means to carry or load (as in 载货 carry goods); 体 means body or substance. A 载体 is the carrying-body: the substance, vehicle, or medium that ferries something else, whether a chemical carrier, a disease vector, or a storage medium.