“+- noun
Etymology: semi- + major
: half the major axis of the elliptical orbit of a celestial body representing the mean or average distance of the body from its primary
“+- noun
Etymology: semi- + major
: half the major axis of the elliptical orbit of a celestial body representing the mean or average distance of the body from its primary
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012