Where does “diatomic” come from?

Diatomic comes from English atomic, from Ancient Greek ἄτομος meaning indivisible, composed of the prefix ἀ- and a root from Proto-Indo-European sem- meaning one.

diatomic (English): Consisting of two atoms; A diatomic molecule or...

Definitions

  1. Consisting of two atoms; A diatomic molecule or...

Ancestry of “diatomic”, step by step

diatomic traces back through 3 separate lines of ancestry.

via English atomic

StepLanguageWordMeaning
1EnglishatomicOf or relating to atoms; composed of atoms;...
2English-icUsed to form adjectives from nouns with the...
3EnglishimageAn optical or other representation of a real...
4Frenchimagepicture, image; frame; first-person singular...
5Portugueseimagemimage; picture; figure; image; image; face
6Spanishimagenimage
7Italianimmagineimage; imago
8Latinimāginem
9Latinim-Alternative form of in-; form of "in"; in
10Latinīn-un-, non-, not
11Latinînin, at, on, upon, from (space)
12Latinenlookǃ beholdǃ; reallyǃ?; come onǃ
13Proto-Italicenin
14Proto-Indo-Europeanh₁énin

via English diatom

StepLanguageWordMeaning
1EnglishdiatomAny of a group of minute unicellular algae having...
2Englishdi-API; two, twice, or double; Alternative form of...
3Latindī-Two, double; di
4Ancient Greekδί-Twice, double
5Ancient Greekδιάthroughout
6Proto-Indo-Europeandwístwice, doubly; in two
7Proto-Indo-Europeandwóh₁two

via English ic

StepLanguageWordMeaning
1Englishicrelated or pertaining to; having the character of

Words derived from “diatomic

Every word from Proto-Indo-European h₁én