
1) Astronomical instrument
Found on
https://www.crosswordclues.com/clue/tellurion

A tellurion (also spelled tellurian, tellurium, and yet another name is loxocosm), is a clock, typically of French or Swiss origin, surmounted by a mechanism that depicts how day, night and the seasons are caused by the movement of the Earth on its axis and its orbit around the sun. The clock normally also displays the age of the moon, and the fou...
Found on
http://en.wikipedia.org/wiki/Tellurion

tellurion 1. A model that shows how day and night and the seasons result from the earth's orbit and its tilted axis in relation to the sun. 2. An apparatus that shows how the movement of earth on its axis and around the sun causes day and night and the seasons.
Found on
http://www.wordinfo.info/words/index/info/view_unit/2101/
No exact match found.