(organic chemistry) an organic compound

“a hundred days of sermonizing, one fart” → a metaphor for how something that one has put great effort into can come to nothing after even a slight mistake, much as a hundred days of serious spiritual study can be lost to the winds

(chiefly Internet slang) thinking with common sense

Kyūjitai form of 初歩的

(linguistics) diachronic

(linguistics) synchronic

unscientific

accidentally (unexpectedly, unintentionally)

unsociable; retiring; solitude-loving

(mathematics) geometrical