Where does “palaeobathymetry” come from?

palaeobathymetry (English) comes from English bathymetry, from English -metry, from Ancient Greek μέτρον, from Ancient Greek -τρον, from Proto-Hellenic -tron, from Proto-Indo-European -trom, from Proto-Indo-European -tḗr — Derives agent nouns from verbs, denoting someone...

Ancestry of “palaeobathymetry”, step by step

StepLanguageWordMeaning
1EnglishbathymetryThe measurement of the depths of the seas
2English-metryForming nouns relating to measures and...
3Ancient Greekμέτρονsomething used to measure: measure, rule, weight;...
4Ancient Greek-τρονForms instrument nouns
5Proto-Hellenic-tronForms instrument nouns from verb stems
6Proto-Indo-European-tromForms nouns denoting a tool or instrument
7Proto-Indo-European-tḗrDerives agent nouns from verbs, denoting someone...
Every word from Proto-Indo-European -tḗr