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tellurian (adj.)

"pertaining to the earth," 1846, from -ian + Latin tellus (genitive telluris) "earth, land, ground; the earth" (related to Tellus, Roman goddess of the earth), probably from PIE root *telho- "ground, floor" (source also of Sanskrit talam "plain, sole of the foot;" Greek telia "dice board;" Latvian telināt "to spread out;" Lithuanian tilės "bottom of a barge, flooring," patalas "bed;" Old Prussian tallus "floor;" Old Church Slavonic tilo "floor;" Russian potolok "ceiling;" Old Irish talam "earth;" Old Norse þilja, Middle Dutch dele "plank").  Or possibly from PIE  *telh- "to bear." As a noun, "inhabitant of Earth" (with reference to supposed inhabitants of other worlds) from 1847.