A rare, inert, gaseous element (Ne; at. no. 10; at. wt. 20.1797), present in the earth's atmosphere to the extent of 15 parts in 1,000,000, used in electric-light bulbs.

【化】氖(元素符号 Ne；原子序 10；原子量 20.1797)。用于灯泡中，就是霓虹电光。