Etymology

geotectonics

geo·tec·ton·ics
G2E1O1T1E1C3T1O1N1I1C3S1

Today it means: Tectonics, structural geology; the study of the structure of the Earth, especially of the formation and movement of tectonic plates. Full definition →

German Geotektonik
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The story

  1. German · borrowed fromGeotektonik
  2. English todaygeotectonics

From geo- + tectonics (although this is apparently first attested later), possibly from German Geotektonik.

Etymology from Wiktionary, CC BY-SA 4.0.