Home › Words › T › tectonospheretectonospheretectonosphere means the outermost layer of the Earth where the crustal movements originate.Among words judged in Lexicurio's Arena, tectonosphere ranks #8,616 of 42,762 for Qualifying.EtymologyFrom tectono- + -sphere.nounThe outermost layer of the Earth where the crustal movements originate.Definitions & examples from Wiktionary (CC BY-SA 3.0).