Az

Azeotrope
A solution that does not change composition when distilled.
Azimuth
In land navigation it is defined as a horizontal angle measured clockwise from a north base line or meridian.
Azimuth Angle
Azimuth measured from 0° at the north or south reference direction clockwise or counterclockwise through 90° or 180°.
Azimuthal Quantum Number
Also known as Angular Momentum Quantum Number.
Azo Compound
The azo group has the general structure Ar-N=N-Ar', where Ar and Ar' indicate substituted aromatic rings.
Azobenzene
Red insoluble crystalline powder.