reflecting telescope

American Heritage® Dictionary of the English Language, Fourth Edition

1. n. A telescope in which light from the object is gathered and focused by a concave mirror, with the resulting image magnified by the eyepiece.

Wiktionary

1. n. A telescope which produces a magnified image by reflecting light through a series of mirrors housed in a tube, using a large curved mirror to gather the light and one or more additional mirrors to transmit the light to an eyepiece.

GNU Webster's 1913

1. adj. See under Telescope.
2. n. a telescope in which the image is formed by a speculum or mirror (or usually by two speculums, a large one at the lower end of the telescope, and the smaller one near the open end) instead of an object glass. See Gregorian, Cassegrainian, Herschelian, and Newtonian, telescopes, above.

WordNet 3.0

1. n. optical telescope consisting of a large concave mirror that produces an image that is magnified by the eyepiece