the Aviation Dictionary

electronic countermeasures . embossing
electronic countermeasures - Methods of decreasing
the effectiveness of enemy communications or radar.
electronic counter-countermeasures - Methods used
by the military to counter the ECM (Electronic
Countermeasures) of the enemy and decrease the
effectiveness of the enemy's countermeasures. See also
electronic countermeasures.
electronic emission - The freeing of electrons from the
surface of a material usually produced by heat.
electronic leak detector - An electronic oscillator
device that emits an audible tone if any refrigerant gas
is picked up in its sensor tube. When a refrigerant leak
is detected, the tone changes.
electronic moisture indicator - A device for checking
moisture in a material. It operates on the principle of
measuring the conductivity of the material.
electronic oscillator - 1. An electronic device used in a
leak detector that emits a changing audible tone when a
leak is detected. 2. An electronic circuit that converts
DC into AC electricity.
electronic voltmeter - An electronic instrument used to
measure voltage.
electronics - 1. The branch of science that deals with
electron flow and its control. 2. In physics, the study
and use of the movement and effects of free electrons
and with electronic devices.
electroplating - An electrochemical method of
depositing a thin layer of metal on some object. The
object to be plated is the cathode, the metal that will be
deposited is the anode, and the electrolyte is a
nonmetallic conductor that will form ions of the plating
metal.
electrostatic charge - A stationary electrical charge on
an object caused by an accumulation of electrons or by
a depletion of electrons.
electrostatic deflection control - A method of
controlling the position of a beam of electrons on the
face of a cathode-ray tube. The beam of electrons that
forms the trace or picture on a cathode-ray tube can be
deflected to the correct position on the screen by
electrostatic charges on plates that are placed above,
below, and on each side of the beam.
electrostatic energy - - In a capacitor, the energy stored
when two opposing electrical charges act across the
dielectric.
electrostatic field -A field of force that exists around a
charged body. Also referred to as a dielectric field.
electrostatic stress - The electrical force that tends to
puncture an insulator. It is caused by an accumulation
of electrical charges on a body.
electrostatics - The branch of physics that deals with
the attraction and repulsion of static electrical charges.
electrovalent or ionic bond - The bond formed by two
atoms when one atom gives up one or more valence
electrons to the other. The bond is based on the
attraction between the positive and negative ions thus
formed.
element - The basic chemical substances that cannot be
divided into simpler substances by chemical means.
element of threat - A perception factor that describes
how a person is unlikely to easily comprehend an event
if that person is feeling threatened since most of a
person's effort is focused on whatever is threatening
them.
elevator -A horizontal, movable control surface on the
tail of an airplane. It is used to rotate the airplane about
its lateral axis.
elevator angle - The angular displacement of the
elevator from its neutral position.
elevator control tab - A metal tab located on the
elevator that helps the pilot control the elevator.
elevator trim stall - A demonstration stall that a flight
instructor shows a student pilot. It simulates the danger
zone defined by a rejected landing or go-around, and is
demonstrated at altitude with the airplane configured
and trimmed for a typical final approach to landing.
elevon - A control surface that combines the functions
of both ailerons and elevators. Movement of the control
wheel to the right or left causes the elevons to move
differentially. (When the left elevon moves up, the
right elevon moves down.) The differential movement
of the elevons causes the airplane to rotate about its
longitudinal (roll) axis.
ellipse - An oval. A curve generated by a point moving
such that the sum of its distances from two fixed points
(foci) is a constant. It is the plane cross-section of a
cylinder at other than a right angle or a right cone at
other than parallel to the base.
elliptical - Of or having the form of an ellipse. An
elongated oval shape.
elongate -- To stretch or lengthen.
e-mail - Electronic mail. Mail sent and received
between computers.
embarkation - The loading of passengers and cargo
onto the airplane.
embedded circulation - A relatively small scale
circulation embedded in, and driven by, a larger scale
circulation.
embossing - The process of raising a boss or
protuberance on the surface.
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