| Glossary and Acronym | Definitions |
|---|---|
| z | zenith distance. |
| Z (caps) | azimuth angle; zenith. |
| Z Diff. | azimuth angle difference. |
| ZD | zone description. |
| Zn | azimuth. |
| Znpgc | azimuth per gyrocompass. |
| zzz | billion |
| μg/l | microgrammes per litre |
| μg/m3 | microgrammes per cubic metre |
