noun
: a solar telescope in which light-gathering mirrors are placed at the top of a tall tower to permit the use of long-focus optics without the deterioration of image suffered in horizontal telescopes
noun
: a solar telescope in which light-gathering mirrors are placed at the top of a tall tower to permit the use of long-focus optics without the deterioration of image suffered in horizontal telescopes
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012