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to change volume when under varying
pressures
In systems using very high
pressure, the compressibility of the liquid
becomes important.
compressible compressible /kəm|presəb(ə)l/
adjective referring to something that
can be compressed
Air is compressible,
but water is not.
compression compression /kəm|preʃ(ə)n/ noun
an act or instance of putting pressure on
something
compression stroke compression stroke /kəm|
preʃ(ə)n strəυk/ noun the stage of an
internal combustion cycle when the
fuel/air mixture comes under pressure
from the upward-moving piston
compressive compressive /kəm|presv/ adjective
referring to forces caused by pressure
on a surface
A strut is designed to
withstand compressive loads.
compressive load compressive load /kəm|presv
ləυd/ noun a load caused by forces acting
in opposite directions towards each
other
compressive stress compressive stress /kəm|presv
stres/ noun the resistance of a body to
crushing by two forces acting towards
each other along the same straight line
compressor compressor /kəm|presə/ noun a
device such as a pump to compress air,
in order to increase pressure
A shaft
connects the turbine to the compressor.

axial
comprise comprise /kəm|praz/ verb to be
made of (NOTE: The correct use of comprise
is often disputed. Some people
regard it as a synonym for the verb
consist of, while others believe it
should be used in an opposite sense: a
tank, pipes, a filter, a pump and a carburettor
comprise the fuel system. It is
sometimes used in its passive form: the
fuel system is comprised of a number of
different parts.)
concentrate concentrate /kɒnsəntret/ verb 1.
to collect in a particular place rather
than spread around
Most of the mass
of air is concentrated at the lowest levels
of the atmosphere. 2. to give attention
and thought to something in particular

This chapter concentrates on
charts.  to concentrate hard to give
all one’s thought and attention to something
concentration concentration /kɒnsən|treʃ(ə)n/
noun 1. the fact of being collected in a
particular place rather than spread
around
The maximum concentration
of ozone is between 20 and 25 km above
the Earth’s surface. 2. the act of giving
attention and thought to something
In
concentric 52
the early stages of training, instrument
flying requires great concentration on
the part of the student pilot.
concentric concentric /kɒn|sentrk/ adjective
having the same centre  concentric
circles circles of different diameters but
with the same centre point
concept concept /kɒnsept/ noun an idea or
abstract principle
The concept of open
skies is not one with which everybody
agrees.  a complicated concept an
idea or series of ideas or principles
which are difficult to understand
concern concern /kən|s%n/ noun 1. serious
interest  a matter for concern something
which must be taken very seriously
2. responsibility
Attention to the
welfare of passengers is the concern of
the cabin crew.
Safety is everybody’s
concern.  this is no concern of ours
this is nothing to do with us  verb 1. to
cause somebody to feel worried  this
report concerns me enormously I am
not at all happy about this report 2. to be
about or to be the subject of
If there is
serious vibration, the crew should shut
down the engine concerned.  this
report concerns me this report is about
me 3. to be of interest and relevance to
 the regulations concern all employees
the regulations apply to all employees
‘…the correct storage and handling of
cargo and especially dangerous goods is
an area which is of considerable concern
to the Federation’ [INTER PILOT]
concrete concrete /kɒŋkrit/ noun a substance
made of cement, sand and water
used in the construction of buildings,
roads, etc.
Rock, sand and concrete
reflect only 10–20% of radiation.
condensation condensation /kɒnden|seʃ(ə)n/
noun the process by which vapour
changes into liquid
If the air becomes
saturated, further cooling results in
condensation. Opposite evaporation
condensation trail condensation trail /kɒnden|
seʃ(ə)n trel/ noun same as vapour
　
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