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Absolute Pressure

A pressure measured on a scale which has, as its zero point, a complete absence of pressure (known as a perfect vacuum).

Absolute Pressure Sensor

A device for sensing pressures from absolute zero.

Absolute Rating

A single eternal explanation for all reality. That point at which all motion in matter ceases, such as absolute zero. Also used in filter ratings to indicate the diameter of the largest particle, normally expressed in micrometers, that will pass through the filter. A filter medium with an exact and consistent pore size theoretically has an absolute rating.

Absolute Zero

The lowest temperature on the Kelvin temperature scale (K), equivalent to - 459.7o F (-273.2o C). Temperature measured from 0 degrees K is an absolute temperature. All molecular motion ceases at 0 degrees K.

Absorb

To take in by capillary action, as in a sponge.

Absorbent Medium

A material akin to a sponge in that it can draw in fluid and retain it within its structure. In this sense, it can act as a filter to remove (absorb) and retain fluid.

Absorptive Lens

A filter lens designed to reduce the effects of glare, reflection, and stray light.

ABV

Air by-pass valve or anti-backfire valve.

AC

Alternating current or altitude compensator.

AC Adapter

A transformer-type power supply that plugs into an ac (alternating current) power outlet and provides low voltage ac or dc to provide power for accessory equipment.

AC Power Supply

A source of alternating current (AC), such as an ac outlet, transformer, inverter, or an alternator (as generator).

AC/TVS

Air cleaner/thermal vacuum switch.

ACC

[1] Air conditioning system [2] An accronym for Automotive Communications Council [3] An acronym for air conditioning compressior clutch signal switch. [4] Automatic Climate Control [5] Active Cruise Control

Acceleration

An increase in velocity or speed.

Acceleration Clause

Allows the lender to speed up the rate at which your loan comes due or even to demand immediate payment of the entire balance of the loan should you default on your loan.

Acceleration Sensor

A sensor that provides information about the rate of forward or reverse acceleration or deceleration; also know as a G-switch.

Acceleration Slip Regulation (ASR)

The name of the traction control system manufactured by Bosch.

Acceleration Squat

The tendency of the rear part of a vehicle to press down on the rear springs during hard acceleration.

Accelerator

A control, usually a foot-operated pedal, linked to the throttle valve of the carburetor and used to control the flow of fuel into the engine.

Accelerator Pedal

A foot-operated device for controlling the flow of fuel into the engine.