The story
- Ancient Greek · borrowed fromμικρολογία“pettiness, stinginess, triviality”
- English todaymicrology
Sense 1 is borrowed directly from Ancient Greek μικρολογία (mikrología, “pettiness, stinginess, triviality”), with the suffix reinterpreted as -logy. Sense 2 is micro- + -logy, effectively the same etymological components.
Etymology from Wiktionary, CC BY-SA 4.0.