N-facility
In the Open Systems Interconnection-Reference Model (OSI-RM), the transfer of data from one layer (N) to the next higher layer (N+1).
Entries starting with N
102 entries.
N-V
Abbreviation of nitrogen vacancy.
nacelle
The part between the rotor and tower of a wind turbine.
nail set
nounCarpentry
A punch that drives in a nail so that its head is level with or below the surface.
nail sick
adjectiveConstruction
Of a house, a roof, or a ship, exhibiting degraded or corroded nails, or otherwise unsound fastenings.
nail sickness
nounConstruction
The degradation of the roofing nails of a house or the nails of a boat, necessitating repair.
NAND gate
A logic gate performing a Boolean logic NAND operation.
nano-amp
An SI unit of electrical current equal to 10⁻⁹ amperes. Symbol: nA
nano-farad
An SI unit of electrical capacitance equal to 10⁻⁹ farads. Symbol: nF
nano-joule
An SI unit of energy, work and heat equal to 10⁻⁹ joules. Symbol: nJ
nano-ohm
An SI unit of electrical resistance equal to 10⁻⁹ ohms. Symbol: nΩ
nano-volt
An SI unit of electrical potential equal to 10⁻⁹ volts. Symbol: nV
nanoampere
An SI unit of electrical current equal to 10⁻⁹ amperes. Symbol: nA
nanobot
nounRobotics
A very small autonomous robot, typically the size of a biological cell, designed to work alone or in very large numbers to achieve some task.
nanogram
An SI unit of mass equal to 10⁻⁹ grams. Symbol: ng
nanojoule
An SI unit of work or energy equal to 10⁻⁹ joules. Symbol: nJ
nanokatal
An SI unit of catalytic activity equal to 10⁻⁹ katals. Symbol: n
nanokelvin
An SI unit of thermodynamic temperature equal to 10⁻⁹ kelvins. Symbol: nK
nanomole
An SI unit of amount of substance equal to 10⁻⁹ moles. Symbol: nmol
nanosecond
An SI unit of time equal to 10⁻⁹ seconds. Symbol: ns
nanovolt
An SI unit of electromotive force equal to 10⁻⁹ volts. Symbol: nV
nap dress
A type of women's dress having heavy smocking, overexaggerated puff sleeves and a typically long, slightly pleated skirt.
nappe
nounHydraulics
Geological nappe whose underside is not in contact with the overflow structure and is at ambient atmospheric pressure.
narrow
verbManufacturing
To contract the size of, as a stocking, by taking two stitches into one.
narrow cloth
Cloth, especially woolen, of less than 54 inches in width.
narrow gauge
A track gauge less than standard gauge; such tracks; a railway that uses them.
narrow work
The construction of passages, air-shafts, etc.
NC
adjectivePlumbing
Initialism of normally closed.
NCAP
Initialism of nematic curvilinear aligned phase.
NCO
Initialism of numerically controlled oscillator.
NDC
Initialism of negative differential conductance.
NDR
Initialism of negative differential resistance.
near field
The region within about half a wavelength from an electrically small antenna. More specifically it is the region within the radiansphere.
neatline
nounConstruction
The line on plan to which a structure is to be built, usually ignoring any small irregularities of the building material.
needle threader
A device for pulling a thread through the small eye of a needle.
needle valve
nounPlumbing
A type of valve having a small orifice and a needle-like plunger, allowing precise regulation of generally small flow rates.
negative edge
The point in time when a signal's value becomes low.
negative logic
The use of the higher(positive) voltage level to represent the Boolean value 0 and the lower voltage(negative) level to represent the Boolean value 1.
negative side waterproofing
nounConstruction
An application wherein the waterproofing system and source of hydrostatic pressure are on opposite sides of the structure.
negative-edge-triggered
adjectiveElectrical engineering
Describing a circuit or component that changes its state only when an input signal becomes low.
neighborhood electric vehicle
nounAutomotive
A low-speed low-weight short-range electric vehicle.
neper
A non-SI unit of the attenuation (or sometimes gain) of field and power quantities such as electronic signals; the natural logarithm of a ratio, with 1 Np (a ratio of 2.718:1) being equivalent to 8.686 dB.
net-zero
adjectiveEnergy and utilities
Of a building or system, generating as much energy through solar, wind, and other renewable resources as it uses from the electricity network.
netco
The part of a telco that operates the network infrastructure.
netlist
A technical description of the connectivity of an electronic design.
network subsystem
The central subsystem of a particular mobile phone operating company in a GSM network.
neutral conductor
A wire or cable that returns electrical current from the consumer to the power supply, usually color-coded with a blue or white casing.
neutral section
nounRail equipment
A dead section of overhead line for supplying power to trains between two live sections, used to separate two power supplies, different phases and supply voltages.
new energy vehicle
nounAutomotive
A plug-in electric vehicle, either a plug-in hybrid electric vehicle or an all-electric plug-in battery electric vehicle
New Zealand cotton
A fiber from the bast of Plagianthus betulinus that resembles cotton.
Newton's first law
The observation that objects in motion tend to stay in motion, and objects at rest tend to stay at rest unless an outside force acts upon them.
Newton's second law
Newton's observation that the rate of change of the momentum of a body is directly proportional to, and in the same direction as, the net force acting on it. Often stated as F = ma: F = force, m = mass, a = acceleration.
Newton's third law
Newton's observation that to every action (force applied) there is an equal and opposite reaction (equal force applied in the opposite direction).
Newtonian mechanics
Early classical mechanics as propounded by Isaac Newton, especially that based on his laws of motion and theory of gravity.
Nickel Plate Road
(or more simply, Nickel Plate) A name given to, and actually used by, the New York, Chicago & St. Louis Railroad.
nicking
The cutting made by the hewer at the side of the face.
nickings
Small coal produced during cutting at the side of the coalface.
niello
nounMetallurgy
Any of various black metal alloys, made of sulphur with copper, silver or lead, used to create decorative designs on other metals.
night letter
A telegram sent overnight at a reduced rate for delivery on the morning of the following day, typically with a minimum charge for 25 words or less.
nightcap
nounManufacturing
A warm cloth cap worn while sleeping, often with pajamas, being common attire in northern Europe before effective home heating became widespread.