| Answer | Crossword Clue |
|---|---|
| ERRED | Adhered to the Ptolemaic system |
| epicycle | A circle of this type used to describe planetary orbits in the Ptolemaic system |
| epicycles | A circle of this type used to describe planetary orbits in the Ptolemaic system |
| deferents | (in the Ptolemaic system of astronomy) The large circular orbit followed by the center of the small epicycle in which a planet was thought to move |
| deferent | (in the Ptolemaic system) the circle around the earth in which a celestial body or the center of the epicycle of its orbit was thought to move |
