Where does “microaerophilous” come from?

microaerophilous (English) comes from English aerophilous, from English -philous, from English -ous, from Middle English -ous, from Old French -us, from Latin -ōsus, from Old Latin -ōssus.

Ancestry of “microaerophilous”, step by step

microaerophilous traces back through two separate lines of ancestry.

via English aerophilous

StepLanguageWordMeaning
1EnglishaerophilousLiving in an aerobic environment
2English-philoushaving an affinity, attraction, preference or...
3English-ousUsed to form adjectives from nouns, to denote...
4Middle English-ous
5Old French-us-ous, used for forming adjectives
6Latin-ōsusose, -ous, -ful (full of or overly prone to)
7Old Latin-ōssus

via English micro

StepLanguageWordMeaning
1EnglishmicroSmall, relatively small; short form of...
2Ancient Greekμικρόςlittle, small
3Proto-Indo-Europeanmēy-soft, tender, dear
Every word from Old Latin -ōssusEvery word from Latin -ōsusEvery word from English -ous