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Entries starting with A

381 entries.

A3

nounRail equipment

A3 class, a class of steam locomotive used on the London and North Eastern Railway.

A4

nameRail equipment

A4 class, a class of steam locomotive used on the London and North Eastern Railway.

AA

nameAutomotive

Initialism of The Automobile Association: a British motoring association founded in 1905.

AAV

nounPlumbing

Abbreviation of air admittance vent.

aback

adverbMarine and shipyard

Backward against the mast; said of the sails when pressed by the wind from the "wrong" (forward) side, or of a ship when its sails are set that way.

ABC

phraseShop talk and trade slang

Initialism of always be charging, a recommendation to remember to charge or be left without use by a low battery at an inopportune time.

abeam

adverbMarine and shipyard

On the beam; at a right angle to the centerline or keel of a vessel or aircraft; being at a bearing approximately 90° or 270° relative.

aberration

nounOptics and imaging

The convergence to different foci, by a lens or mirror, of rays of light emanating from one and the same point, or the deviation of such rays from a single focus; a defect in a focusing mechanism that prevents the intended focal point.

abfarad

nounIndustrial electronicsdated

A unit of capacitance equal to one billion (10⁹) farads, used in the centimeter-gram-second system of units

ablative

adjectiveMarine and shipyard

Sacrificial, wearing away or being destroyed in order to protect the underlying material, as in ablative paints used for antifouling, or ablative heat shields used to protect spacecraft during reentry. .

able-bodied

adjectiveMarine and shipyard

Capable of performing all requisite duties as a seaman, specifically in the Royal Navy, a rating between leading and ordinary.

ABS

nounPlumbinginformal

Initialism of acrylonitrile butadiene styrene.

absorptance

nounOptics and imaging

Absorbed radiation and incident radiation in a ratio format; a measurement that shows how well a surface absorbs radiation.

AC

nounElectrical engineeringinformal

Initialism of alternating current (often used to indicate an alternating potential rather than a current).

accessory battery

nounAutomotive

The standard 12V rechargeable automotive lead-acid battery or the stand-in battery for a standard 12V automotive battery found in internal combustion engined vehicles, typically used to power the typical 12V systems, the accessories, infotainment, automotive computer, and electronic systems.

accident

nounTransport and logistics

A collision or crash of a vehicle, aircraft, or other form of transportation that causes damage to the transportation involved; and sometimes injury or death to the transportation's occupants or bystanders in close proximity. (but see Usage notes)

accidental colour

nounOptics and imaging

A colour depending on the hypersensibility of the retina of the eye for complementary colours. They are purely subjective sensations of colour which often result from the contemplation of actually coloured bodies.

accumulator

nounHydraulics

A container which stores hydraulic power for release, in the form of a pressurized fluid (often suspended within a larger tank of fluid under pressure).

achromatic lens

nounOptics and imaging

A lens generally composed of two separate lenses, one convex and one concave and generally of different materials, in such a way that the chromatic aberration produced by one is corrected by the other.

acorn

nounMarine and shipyard

A cone-shaped piece of wood on the point of the spindle above the vane, on the mast-head.