long-welded
adjectiveRail equipment
Of rails for railway track, welded into longer lengths, usually before they are laid, to help eliminate jointed track.
Entries starting with L
303 entries.
longarm
A free-motion sewing machine with an extended arm and frame for holding large quilts.
longitudinal
nounRail equipment
A railway sleeper lying parallel with the rail.
longitudinal aberration
Deviation from the correct point of focus measured parallel to the axis.
longline
A long cable used to raise or lower loads from a helicopter when landing is not possible.
longtail cast-on
A type of cast-on technique involving a long tail of yarn.
longwall
A long wall of coal that is mined in a single slice.
lookout
nounConstruction
A joist that extends in cantilever out from the exterior wall (or wall plate) of a building, supporting the roof sheathing and providing a nailing surface for the fascia boards.
loon
A round area of pavement that protrudes from one side of a road to accommodate turning vehicles with a wide turning circle.
loop
nounRail equipment
A place at a terminus where trains or trams can turn round and go back the other way without having to reverse; a balloon loop, turning loop, or reversing loop.
loppers
Pruning shears with long handles, used for lopping.
Lorentz force
The force exerted on a charged particle in an electromagnetic field.
Lorenz gauge
A partial gauge fixing of the electromagnetic vector potential, used to eliminate the redundant spin-0 component in the (1/2,1/2) representation of the Lorentz group.
LORRI
Acronym of Long-Range Reconnaissance Imager, a long-focal-length imager designed for high resolution and responsivity at visible wavelengths.
lorry
A truck with an open carriage, sometimes used for transporting construction workers.
LOS
Initialism of loss of signal.
lossful
adjectiveElectrical engineering
Lossy; involving loss of information.
lossless junction
An interconnection point between components or transmission lines where the total power or energy entering the junction is exactly equal to the total power or energy leaving it.
lossy
adjectiveElectrical engineering
Of a communication channel, subject to loss of signal strength.
lost neutral
A dangerous situation where the neutral wire in a split-phase power system becomes broken or disconnected, forcing all electrical current to flow directly between the two line wires and exposing loads connected between line and neutral to unstable and potentially-excessive voltages, posing a risk of equipment damage, electrical fire, or electric shock.
lost with all hands
adjectiveMarine and shipyard
Destroyed or sunk, with all passengers and crew having died in the process.
loup
A mass or ball of iron in a pasty condition, beaten by the trip hammer or rolls.
low wire
A cable carrying electrical power at fifty volts or less.
low-powered
adjectiveMechanical engineering
Possessing little power or capacity.
low-slope roof
nounConstruction
According to ASTM standard E 1918-97, a roof whose uppermost part is installed at a slope of 2/12 or 1:6 (9.5 degrees) or less.
lowpass
adjectiveIndustrial electronics
Describing a filter, circuit, or system that rejects or attenuates a frequencies above a specified value while passing those be.
lpf
nounPlumbing
Abbreviation of liters per flush.
LPI
Initialism of leading pedestrian interval, a brief period when pedestrians are allowed to start crossing a street before vehicles are allowed to move.
LPR
Abbreviation of line printer.
LPRP
Initialism of Lunar Precursor Robotic Program.
LPSC
Initialism of Lunar and Planetary Science Conference.
LRG
Initialism of liquefied refinery gas.
LRO
Initialism of Lunar Reconnaissance Orbiter.
LS-swap
A car where the engine has been replaced by a General Motors LS-series internal combustion gasoline engine.
LSD
Initialism of limited-slip differential.
LSI
Initialism of large scale integration.
LSPI
nounAutomotive
Initialism of low-speed pre-ignition.
LSV
nounAutomotive
Initialism of low speed vehicle.
LT
nounManufacturing
Initialism of left twist.
LTE
Initialism of loss of tail rotor effectiveness (by a helicopter).
LTO
Initialism of lunar transfer orbit.
LU
nameRail equipment
Initialism of London Underground.
LUCAS
nounRobotics
Acronym of low-cost uncrewed combat attack system
LUDs
local usage details; a list of locally called numbers, often provided by telecom companies to the police as part of an investigation.
lue
To sift using a sieve, particularly in mining tin or silver.
luff
To alter the vertical angle of the jib of a crane so as to bring it level with the load.
lug
A device for terminating an electrical conductor to facilitate the mechanical connection; to the conductor it may be crimped to form a cold weld, soldered or have pressure from a screw.
lugnut
nounAutomotive
A specially shaped nut used to hold the wheels on an automobile.
lum
A chimney; also, the top part of a chimney.
luminance
The luminous flux emitted in a given direction divided by the product of the projected area of the source element perpendicular to the direction and the solid angle containing that direction (i.e. luminous intensity divided by unit area), measured in stilbs or apostilbs.
lunar
An observation of a lunar distance (“the angle between the Moon and another celestial body”), especially for establishing the longitude of a ship at sea.
lunar distance
A unit of length, based on the average distance between the Earth and the Moon.
luncart
a lenticular mass, nodule, or ball
lurryman
One who handles or manages a lurry.
Luton
A part of the body of a commercial or recreational vehicle that extends over the cab.
luxury
adjectiveAutomotive
Pertaining to the top-end market segment for mass production mass market vehicles, above the premium market segment.
LVDS
Initialism of low voltage differential signaling.
LVW
nounAutomotive
Abbreviation of landing vehicle, wheeled (amphibious truck).
LWS
Initialism of Living with a star.
lye
nounRail equipment
A short side line, connected with the main line; a turn-out; a siding.