| Acronym | Definition |
|---|
| Z | Zulu |
| Z | Impedance |
| Z | GMT / UTC (logging abbreviation) |
| Z | Effort (US DoD) |
| Z | Zone |
| Z | Speed Rating (department of transportation maximum tire speed rating of 149+ MPH) |
| Z | Zero |
| Z | Zoloft (anti-depressant) |
| Z | All Stop (bell log on a US Navy ship) |
| Z | Zusammen |
| Z | Atomic Number (number of protons in nucleus) |
| Z | Zodiac |
| Z | Flash (Priority) |
| Z | Flash (logging abbreviation) |
| Z | Zenith |
| Z | Corporation (IRB) |
| Z | Zorro |
| Z | Zillion |
| Z | Azimuth |
| Z | Footlocker (stock symbol) |
| Z | Zentner (German 50kg) |
| Z | Set of Integers (math) |
| Z | Zulu Time |
| Z | Zetta- (prefix, 10^21 or sextillion) |
| Z | Certain Amino Acids (glutamic acid, glutamine or a substance that yields glutamic acid on hydrolysis) |
| Z | Zygorhynchus (bacterium) |
| Z | Proton Number (physics) |
| Z | Sales in Full (newspaper stock table abbreviation) |
| Z | Lighter-Than-Air Vehicle (US Military aircraft type designation) |
| Z | Zionism/Zionist |
| Z | Administrative Aircraft (US Navy) |
| Z | Redshift Factor (determines how fast a cosmic object is moving away from Earth) |
| Z | Ultra Heavy Nuclei |
| Z | Unit of Sleep |
| Z | Zylog, Incorporated |
| Z | Benzyloxycarbonyl Compound |
| Z | Zuckung - Contraction |
| Z | Animalian Sex Chromosome (such as chickens and moths) |
| Z | Jet Terminal Area |
| Z | Depth axis in Cartesian coordinate system |
| Z | Discrete-time complex variable (analogous to S in continuous-time; electrical engineering) |
| Z | Center of an algebraic group (mathematics) |
| Z | Aircraft Symbol Prefix – Planning |