[te-loo
r-ee-on] 
| an apparatus for showing the manner in which the diurnal rotation and annual revolution of the earth and the obliquity of its axis produce the alternation of day and night and the changes of the seasons. |
| tel·lu·ri·on (tě-lŏŏr'ē-ŏn') 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.] |
| Main Entry: | tellurion |
| Part of Speech: | n |
| Definition: | See terrasphere |