The term 'Radio Wave REFLECTOR' is a combination of two words, 'Radio Wave' and 'REFLECTOR'. The first word, 'Radio Wave', refers to electromagnetic radiation that is used for communication. The second word, 'REFLECTOR', refers to an object or surface that reflects light, sound, or other forms of energy. The combination of these two words describes the Ionosphere, which is a layer of the Earth's atmosphere that reflects radio waves and allows them to travel long distances. This layer of the atmosphere is composed of charged particles, which are able to reflect radio waves and allow them to travel around the world.