tectonic
adjective /tekˈtɒnɪk/
/tekˈtɑːnɪk/
[only before noun] (geology)- relating to the structure of the earth’s surface see also plate tectonicsTopics Geographyc1Word Originmid 17th cent. (originally relating to building or construction): via late Latin from Greek tektonikos, from tektōn ‘carpenter, builder’.