Main Entry: tec·ton·ic

Pronunciation: \tek-ˈtä-nik\

Function: adjective

Etymology: Late Latin tectonicus, from Greek tektonikos of a builder, from tektōn builder — more at technical

Date: 1894

1 : of or relating to tectonics
2 : having a strong and widespread impact <a tectonic shift in voting patterns>

— tec·ton·i·cal·ly \-ni-k(ə-)lē\ adverb