Where does “antimicrosome” come from?

antimicrosome (English) comes from English microsome, from English some, from Middle English som, from Old English sum, from Proto-West Germanic *sum, from Proto-Germanic sumaz, from Proto-Indo-European sem- — together, one.

Ancestry of “antimicrosome”, step by step

antimicrosome traces back through two separate lines of ancestry.

via English microsome

StepLanguageWordMeaning
1EnglishmicrosomeA vesicle formed as an artifact of cell...
2EnglishsomeA certain number, at least two; An indefinite...
3Middle Englishsomsome
4Old Englishsumsome
5Proto-West Germanic*sumsome
6Proto-Germanicsumazsome (one), a certain (one)
7Proto-Indo-Europeansem-together, one

via English anti

StepLanguageWordMeaning
1EnglishantiOpposed to something; That has a torsion angle...
2Englishanti-Against, hostile to; Contrasting with the norm;...
3Ancient Greekἀντι-anti-, against; like, reminiscent of
4Ancient Greekᾰ̓ντῐ́opposite
Every word from Proto-Indo-European sem-Every word from Proto-Germanic sumazEvery word from Proto-West Germanic *sum