1800, "containing tellurium;" 1836, "pertaining to Earth as a planet;" 1842, "pertaining to or proceeding from the earth;" the last two senses from Latin tellus, tellum (genitive telluris) "earth, the earth" (see tellurian) + -ic.
tell
teller
telling
telltale
tellurian
telluric
telluride
tellurium
telly
telophase
telos