coudé telescope

a telescope in which light from the primary mirror is reflected along the polar axis to additional mirrors, and in which the focus (coudé focus) is independent of the telescope's motion, permitting the use of heavy instruments without disturbing the delicate balance of the telescope.

1920–25; < French coudé bent, elbowed, past participle of couder to bend, verbal derivative of coude elbow ≪ Latin cubitus cubit Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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coude telescope

a reflecting telescope so constructed that the light is led to a plate holder or spectrograph 
WordNet® 3.0, © 2006 by Princeton University.
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