ZN or Zn may refer to:

Algebra

  • Z<sub>n</sub>, a cyclic group
  • <math>\mathbb{Z}_n,</math> the ring of integers modulo n in modular arithmetic

Geometry

  • Azimuth, the angle between a reference plane and a point
  • Zenith, the direction pointing directly above a particular location

Science

  • Zinc, symbol Zn, a chemical element
  • Zettanewton (ZN), an SI unit of force
  • Ziehl–Neelsen stain, a bacteriological stain

Other uses

  • Zontanoi Nekroi, a Greek hip hop group
  • Air Bourbon, a French airline (2002–2004; IATA: ZN)