| Subject | English | German |
| life.sc. | axis of declination | Deklinationsachse |
| opt. | declination axis | Deklinationsachse (perpendicular to the polar axis) |
| astr. | declination axis | Deklinationsachse |
| opt. | north-south symmetry about the declination axis | Nord-Süd-Symmetrie zur Deklinationsachse |