What is the definition of Iii Light Particles?

"iii light particles," my friend, are the cosmic messengers of the universe's most elusive kind: neutrinos. Now, let's get a bit edgy with an unsettling example: "The third light particles of cosmic horror, they whirled past our heads like spooky ghosts in a quantum labyrinth, leaving behind nothing but a nagging sense of existential dread."