Dictionary of Aviation上(7)

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well as
additional additional /ə|dʃ(ə)nəl/ adjective
added or extra
additive additive /dtv/ noun a chemical
substance, often liquid, added to
another substance to give it extra qualities

Additives are used in engine oils
to prolong the life of the engine.
Antiicing
additives are used in radiator
coolants.
adequate adequate /dkwət/ adjective
enough, sufficient
The compressor
must provide an adequate airflow
through the engine.  adequate fuel
enough fuel
ADF ADF abbreviation automatic direction
finder
adhere adhere /əd|hə/ verb to stick as if
glued
Clear ice adheres strongly to
airframes.
adhesive adhesive /əd|hisv/ noun glue 
adjective having the sticking quality of
glue
adhesive tape
Adhesive bonding
of aluminium parts is widely
employed.
ADI ADI /edi|a/ abbreviation attitude
direction indicator or attitude director
indicator
adiabatic adiabatic /də|btk/ adjective 1.
referring to processes through which
heat cannot be lost or gained 2. referring
to a change in temperature in a
mass of air, which occurs when the air
is compressed or expanded by an
increase or decrease in atmospheric
pressure and does not involve the air
losing heat to, or gaining heat from, its
surroundings
adiabatic compression adiabatic compression
/dəbtk kəm|preʃ(ə)n/ noun
compression caused by atmospheric
factors, which makes descending air
warm up
adiabatic cooling adiabatic cooling /dəbtk
kulŋ/ noun a process in which
ascending air is cooled by a decrease in
atmospheric pressure without heat
transfer
adiabatic expansion adiabatic expansion /dəbtk
k|spnʃ(ə)n/ noun expansion caused
by atmospheric factors, which makes
ascending air cool down
Cooling by
adiabatic expansion may result in cloud
formation.
adiabatic heating adiabatic heating /diə|btk
hitŋ/ noun a process in which
descending air is heated by an increase
in atmospheric pressure without heat
transfer
adjacent adjacent /ə|d"es(ə)nt/ adjective
next to or near
Fire extinguishers
should be positioned adjacent to the
aircraft during all ground-running
operations.
adjust adjust /ə|d"st/ verb to change and
improve the position or setting of a
piece of equipment
The pilot adjusts
the throttle or propeller controls.  to
adjust the seat to move the seat into a
position suitable for yourself  to
7 advice
adjust the volume to increase or
decrease the volume to improve the
sound quality
adjustable adjustable /ə|d"stəb(ə)l/ adjective
designed to be adjusted
An adjustable
stop on the throttle control ensures a
positive idling speed.
adjustment adjustment /ə|d"stmənt/ noun 1. a
change to improve the setting, position
or operation of something
A slight
adjustment to the seat will make it much
more comfortable to sit in. 2. the act of
changing something to improve its setting
or position
Maximum system
pressure is often controlled by adjustment
of the main engine-driven pump.
admit admit /əd|mt/ verb to allow to enter

Cold air can be admitted to the cabin
through adjustable louvres or shutters.
adopt adopt /ə|dɒpt/ verb to choose to use
something as standard equipment or to
make it standard procedure
A policy of
no smoking on all flights has been
adopted by many airlines.  widely
adopted now in standard use with many
companies, institutions and organisations
adoption adoption /ə|dɒpʃən/ noun the act of
using something as standard equipment
or making it standard procedure
In
spite of the adoption of the axial flow
type compressor, some engines retain
the centrifugal type.
ADR ADR abbreviation accident data
recorder
ADS ADS abbreviation automatic dependent
surveillance
ADT ADT abbreviation approved departure
time
advance advance /əd|vɑns/ noun 1. a change
that improves something  enormous
advances in aircraft design great
progress or developments in aircraft
design 2.  in advance of ahead of

The Gulf region is three hours in
advance of GMT.  verb 1. to move forwards,
　
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