The story
- Latin · derived from-īnus
- Italian · borrowed from-ino“-ine, -o: forming diminutives”
- English today-ino
From Italian -ino (“-ine, -o: forming diminutives”), from the dative form of Latin -īnus. In its use in physics, originally after the model of earlier neutrino, coined by Enrico Fermi in 1933. Internet slang usages gained currency in the second half of the 2010s.
Etymology from Wiktionary, CC BY-SA 4.0.