P2P
adjectiveTransport and logistics
Initialism of point-to-point.
Entries starting with P
582 entries.
P5
Initialism of Pentium 5 a slang term used to refer to the successor to the Pentium 4 before the name was revealed by Intel.
Pacer
nounRail equipment
A British lightweight railbus diesel multiple unit of class 140, 141, 142, 143 or 144.
Pachuca tank
nounMetallurgy
A high narrow tank with a central cylinder for the introduction of compressed air, used in the agitation and settling of pulp (pulverized ore and water) during treatment by the cyanide process.
Pacific
nounRail equipment
A steam locomotive of the 4-6-2 wheel arrangement.
pad
An exposed area of copper on a printed circuit board meant for connecting wires or electronic components.
paddle shifter
nounAutomotive
Either of a pair of paddles, fitted to the steering wheel of a high-performance motor car, allowing the gears to be changed up or down in a single movement, and without using the clutch. It is a form of sequential shifter.
paddock
A place in a superficial deposit where ore or washdirt (“earth rich enough in metal to pay for washing”) is excavated; also, a place for storing ore, washdirt, etc.
paddy field
A flooded field where rice is grown.
PAE
Initialism of power added efficiency.
page
A message sent to someone's pager.
page proof
A trial page or proof that has been made up into pages.
pager
A wireless telecommunications device that receives text or voice messages.
paint
To detect (something) with radar.
PAL
Acronym of Philippine Airlines, a flag carrier of the Philippines
palm
A metallic disk attached to a strap and worn in the palm of the hand; used to push the needle through the canvas, in sewing sails, etc.
PAM
Abbreviation of power amplitude modulation.
Pamela hat
A straw hat or bonnet popular from the 1790s to the 1870s.
pampinate
To strike off the superfluous shoots and twigs of vines, to aid the growth of the fruit.
pan
nounCarpentry
A recess, or bed, for the leaf of a hinge.
pan former
Power roll forming equipment that produces a metal panel from a flat sheet.
pan-pan
A radio call indicating a minor emergency requiring some assistance, or priority in handling, but not endangering the safety of the vessel or those aboard.
pancake
verbConstruction
To collapse one floor after another.
panel
One of the districts divided by pillars of extra size, into which a mine is laid off in one system of extracting coal.
pantograph
nounRail equipment
A similarly-formed conductive device, now usually Z-shaped, that collects electric current from overhead lines for trains and trams.
pantoscopic
adjectiveOptics and imaging
Designed to focus on both near and distant objects at the same time, typically by means of a tilt in the lens
paper airplane
An aircraft under development (so named because it remains only on paper to date; a tongue-in-cheek sense with acknowledgment of the original sense).
paper clay
Clay mixed with shredded paper or other fibres, valued for its strength and light weight in the production of large ceramic works.
paper jam
A malfunction in a computer's printer or a photocopier or similar device occurring when sheets of paper become jammed inside.
parachute
A device, generally constructed from fabric, that is designed to employ air resistance to control the fall of an object or person, causing them to float instead of falling.
paraffin
Any member of the alkane hydrocarbons.
paraformer
An electrical transformer that uses magnetic inductance
paragon
The size of type between great primer and double pica, standardized as 20-point.
parallax motion
The apparent motion of a tracking-locked foreground object against a background, when the camera is moving across the environment. (ie. A stationary object will appear to move across a background, when a moving camera is locked to track it)
parallel
A character consisting of two parallel vertical lines, used in the text to direct attention to a similarly marked note in the margin or at the foot of a page.
parallelogram of forces
A parallelogram, two adjacent sides of which are vectors having the same initial point and representing two forces acting simultaneously upon this point, such that the resultant of the forces is given by the diagonal of the parallelogram that passes through this point.
parasite
A component of a composite aircraft which is carried aloft and air-launched by a larger carrier aircraft or mother ship to support the primary mission of the carrier; a parasite aircraft.
parasitic
A component of a circuit that does not show up in a circuit's schematic but does show up in the circuit's behavior.
parasitic element
A circuit element or property that is present within an electrical component, and has a negative effect on the performance of the circuit.
parathesis
The matter contained within brackets.
parcel shelf
nounAutomotive
A usually removable shelf lying behind the back seats or over the trunk of a car.
parcels
A parcels train, normally carrying nothing but parcels.
PARD
Acronym of periodic and random deviations, a form of electrical noise.
parge
nounConstruction
A coat of cement mortar on the face of rough masonry, the earth side of foundation and basement walls.
pargeting
nounConstruction
A form of decorative plasterwork used on exterior walls of buildings.
parging
nounConstruction
A coat of cement mortar on the face of rough masonry, the earth side of foundation and basement walls; a parge.
parison
A spherical mass of glass, rolled immediately after being taken out of the furnace.
parity
The number of times a sow has farrowed.
park
nounAutomotive
The gear into which one shifts an automatic transmission when one is parking a car or truck. (Denoted with symbol P on a shifter's labeling.)
parka
A long jacket with a hood which protects the wearer against rain and wind.
parliamentary
adjectiveRail equipment
Of a class of train which, by an act of parliament, ran both ways along a line, at least once each day, at the rate of one penny per mile.
parliamentary train
nounRail equipment
Originally a requirement in the Railway Regulation Act 1844 for railways to run at least one train a day each way, at a cost to passengers of no more than one penny a mile, on every railway line in the country. Presently the term is used for passenger trains that serve a line or station only once a day or week to avoid the cost of applying for closure.
parsec
Syllabic abbreviation of parallax second.
part number
A unique, typically alphanumeric code assigned to a specific component, material, or assembly in order to simplify identification, procurement, and inventory management.
parterre
A flowerbed, particularly an elevated one.
parting sand
nounMetalworking
Dry, non-adhesive sand sprinkled upon the partings of a mould to facilitate the separation by not allowing the mould to stick together.
party line
A single telephone line which is shared by two or more households. Formerly common from the inception of telephony (1880s) through the mid-twentieth century.
pass
nounRail equipment
A passing of two trains in the same direction on a single track, when one is put into a siding to let the other overtake it.
pass transistor
A transistor used as a switch to pass logic levels between nodes of a circuit, instead of as a switch connected directly to a supply voltage.
passage
A strait or other narrow waterway.