Longman Dictionary of Contemporary English
Douglas Harper's Etymology Dictionary
before vowels tel-, word-forming element meaning "far, far off, operating over distance" (also, since c.1940, "television"), from Greek tele-, combining form of tele "far off, afar, at or to a distance," related to teleos (genitive telos) "end, goal, completion, perfection," literally "completion of a cycle," from PIE *kwel-es- (cognates: Sanskrit caramah "the last," Breton pell "far off," Welsh pellaf "uttermost"), perhaps from root *kwel- (1) (see cycle (n.)).
Wiktionary
pre. 1 over a distance 2 television 3 telegraph 4 telephone 5 teleport 6 telegovern
Usage examples of "tele-".
The problem during these conferences was that there were always tele- phone calls from important people-such as Mrs.
Charley began, eXplained why, and related the details of his tele- phone conversation with the duty officer of the Philadelphia office of the Fed- eral Bureau of Investigation.
United 93 crashed in Pennsylvania, there had been no mention of its hijacking and the FAA had not yet been added to the tele- conference.