Ze

Zeeman Effect
The splitting of spectral lines when an external magnetic field is applied.
Zener Diode
A diode that has been specially designed to break down at a particular voltage.
Zener Voltage
reverse voltage at which breakdown occurs in a zener diode.
Zenith
Point in the Sky that is directly overhead.
Zenith Attraction
The effect of the earth′s gravity on a meteoric body.
Zenith Distance
This is for bodies above the horizon and is the arc of a vertical circle between the zenith and a point on the celestial sphere, measured from the zenith through 90 degrees.
Zenith Telescope
Instrument for observing stars near the zenith.
Zenithal
Of or pertaining to the zenith.
Zenneck Surface Wave
A low frequency transverse magnetic surface wave that travels along the interface between the ground and the air, in which the propagating energy does not radiate into space but is concentrated near the guiding surface.
Zenographic
Referring to positions on Jupiter.
Zeolite
A natural mineral that has the capacity to absorb hardness, calcium, and magnesium ions from water.
Zeolite Softening
Refers to the process, where zeolite chemicals are capable to exchange ions with the hardness causing impurities of the water.
Zeppelin, Ferdinand von
German general and later airship manufacturer. Most famously the founder of the Zeppelin Airship company.
Zepto
Prefix representing a multiplication of 10-21
Zero
In 876BC a symbol to represent zero was first used in India.
Zero Absolute Pressure
A total vacuum. Zero on the absolute pressure scale.
Zero Air
Atmospheric air purified to contain less than 0.1 ppm total hydrocarbons.
Zero Angle
An angle whose measure is 0.
Zero Dimensional
Having no dimension; a point.
Zero Divisors
Nonzero elements of a ring whose product is 0.
Zero Element
The element 0 is a zero element of a group if a+0=a and 0+a=a for all elements a.
Zero Emission Vehicle
A level of standards for tailpipe emissions.
Zero g
The condition when no force (such as weight) is sensed.
Zero Gravity
The condition when no force (such as weight) is sensed.
Zero Insertion Force Socket
A standard IC-socket design requiring the user to move a lever to insert or remove the chip.
Zero Kelvin
At this temperature atoms have no energy.
Zero Offset
The output of a sensor at zero input for a specified supply voltage or current.
Zero Order Reaction
A reaction with a reaction rate that does not change when reactant concentrations change.
Zero Point Energy
A minimum possible energy for an atom or molecule predicted by quantum mechanics.
Zero-age Main Sequence
The position on the main sequence of a Hertzsprung-Russell diagram.
Zeroing
The process of adjusting a synchro to its electrical zero position.
Zero-Length Rocket
A rocket with sufficient thrust to launch a vehicle directly into the air.
Zero-Lift Chord
A chord taken through the trailing edge of an airfoil in the direction of the relative wind when the airfoil is at a zero-lift angle of attack.
Zero-Offset Steering
A steering system whose geometry has a scrub radius of zero.
Zero-Point Pressure
The pressure contributed by degenerate electrons, which do not come to rest even at absolute zero.
Zeroth Law of Thermodynamics
If two bodies are each in thermal equilibrium with a third body, then all three bodies are in thermal equilibrium with each other.
Zeta
A letter of the Greek alphabet.
Zeta Machine
An experimental thermonuclear device which generates a plasma inside a torus and employs the pinch effect for heating and compression.
Zeta Potential
Electric potential across all phase boundaries between solids and liquids.
Zetta
Prefix representing a multiplication of 1021
Zettametre
A metric unit of distance equal to 1021 metres.
ZEV
Abbreviation of Zero Emission Vehicle.