coude telescope: a reflecting telescope so constructed that the light is led to a plate holder or spectrograph
reflecting telescope: optical telescope consisting of a large concave mirror that produces an image that is magnified by the eyepiece
vat dye: a water-insoluble dye that is applied by reducing the dye to an alkaline form, applying the dye, then regenerating the insoluble dye by oxidation in the material; used for dyeing cotton