a colorless odorless gaseous element that give a red glow in a vacuum tube one of the six inert gasses occurs in the air in small amounts
एक बेरंग
a radioactive transuranic element synthesized from californium
कैलिफोर्नियम से संश्लेषित एक रेडियोधर्मी ट्रान्स्वायरिक तत्व