tel·lu·ri·on 
(tĕ-lrē-ŏn′) also tel·lu·ri·an (-ən)
(tĕ-lrē-ŏn′) also tel·lu·ri·an (-ən)n.
An apparatus that shows how the movement of the earth on its axis and around the sun causes day and night and the seasons.
[New Latin : TELLURO- + Greek -ion, diminutive suff.]