Presumably it's based on https://en.wiktionary.org/wiki/flatus https://en.wiktionary.org/wiki/flatus although the combination makes a Latin-Greek hybrid, trad

Presumably it's based on https://en.wiktionary.org/wiki/flatus https://en.wiktionary.org/wiki/flatus although the combination makes a Latin-Greek hybrid, traditionally potentially controversial. https://en.wikipedia.org/wiki/Hybrid_word https://en.wikipedia.org/wiki/Hybrid_word