n. a reflecting telescope in which light reflected from a secondary mirror passes through a hole in a primary mirror.
Etymology: J. Gregory, Sc. mathematician d. 1675, who devised it
n. a reflecting telescope in which light reflected from a secondary mirror passes through a hole in a primary mirror.
Etymology: J. Gregory, Sc. mathematician d. 1675, who devised it
Oxford English vocab. Оксфордский английский словарь. 2012