ˈeksō+ˌ- noun
Etymology: International Scientific Vocabulary exo- + sphere
: the outer fringe region of the atmosphere variously estimated to begin at an altitude of 200 to 600 miles
ˈeksō+ˌ- noun
Etymology: International Scientific Vocabulary exo- + sphere
: the outer fringe region of the atmosphere variously estimated to begin at an altitude of 200 to 600 miles
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012