Definisi : n 1. emission of radiant energy, penyinaran: ~ may be used to speed up a chemical reaction, penyinaran dapat digunakan utk mempercepat tindak balas kimia; 2. energy radiated, sinaran: ~ from the sun, sinaran matahari; the long-term effects of ~, kesan jangka panjang sinaran; 3. small particles of radioactive substance, sinaran. (Kamus Inggeris-Melayu Dewan)