Where does “Normalnull” come from?

Normalnull (German) comes from German Null, from German Nulla, from Italian nulla, from Latin nūlla, from Latin nūllus, from Proto-Italic oinos, from Proto-Indo-European óynos — one; single.

Normalnull (German): The mean altitude of sea level; mean sea level

Definitions

  1. The mean altitude of sea level; mean sea level

Ancestry of “Normalnull”, step by step

Normalnull traces back through two separate lines of ancestry.

via German Null

StepLanguageWordMeaning
1GermanNullzero; failure, loser
2GermanNulla
3Italiannullafeminine singular of nullo; nothing, anything;...
4Latinnūllano
5Latinnūllusno one, none, not any, nothing
6Proto-Italicoinoscardinal number 1 Previous: n/a Next: *duō;...
7Proto-Indo-Europeanóynosone; single

via German Normal

StepLanguageWordMeaning
1GermanNormalstandard, normal
2Latinnormālisperpendicular, square, with right angles
3Latinnōrmaa carpenter’s square
4Ancient Greekγνώμωνinterpreter, discerner; carpenter's square;...
5Ancient GreekγιγνώσκωI am aware of; I perceive, observe, know, learn;...
6Proto-Indo-Europeanǵn̥h₃sḱétito recognise
7Proto-Indo-Europeanǵneh₃-to know
Every word from Proto-Indo-European óynosEvery word from Proto-Italic oinosEvery word from Latin nūllus