zeni - “how
- zenith
- zenith distance
- zenith fix
- zenithal projection
- zenithal rain
- zephyr
- zero g
- zero meridian
- zero stage
- zero-delivery pressure
- zero-fuel weight
- zero-length launching
- zero-lifed
- zero-lift angle
- zero-lift chord
- zero-lift drag
- zero-lift line
- zero-thrust pitch
- zero-timed
- zero-zero landing
- zero-zero seat
- zero-zero stage
- zonal index
- zonal wind
- zonda
- zone description
- zone time
- zoom
- zoom ceiling
- Zulu time
- zyglo
- “altitude restrictions are cancelled”
- “at your discretion”
- “ATC (air traffic control) advises”
- “ATC clears”
- “ATC requests”
- “clearance cancelled...”
- “clearance valid...”
- “clearance void”
- “Go ahead”
