Where does “diatomous” come from?

diatomous (English) comes from English dia-, from Ancient Greek δῐᾰ-, from Ancient Greek διά, from Proto-Indo-European dwís, from Proto-Indo-European dwóh₁ — two.

diatomous (English): Having a single, distinct, diagonal cleavage;...

Definitions

  1. Having a single, distinct, diagonal cleavage;...

Ancestry of “diatomous”, step by step

StepLanguageWordMeaning
1Englishdia-through, across, between
2Ancient Greekδῐᾰ-apart; through, across; through; in different...
3Ancient Greekδιάthroughout
4Proto-Indo-Europeandwístwice, doubly; in two
5Proto-Indo-Europeandwóh₁two
Every word from Proto-Indo-European dwóh₁ →Every word from Ancient Greek δῐᾰ- →Every word from Proto-Indo-European dwís →