A phenomenon relating to the nucleus of an atom or the energy produced through nuclear reactions.

An instance or occurrence of something, often with significant impact in science or politics.

औसत घटना

English Usage: The nuclear phenomenon of the 20th century changed global politics.

Hindi Usage: 20वीं सदी की परमाणु घटना ने वैश्विक राजनीति को बदल दिया।