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
173 entries.
N-V
Abbreviation of nitrogen vacancy.
nacelle
The part between the rotor and tower of a wind turbine.
nadir
An empty box added beneath a full one in a beehive to give the colony more room to expand or store honey.
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
nanophotonics
The science that studies the behaviour of light, and of optical devices, on a nanometre scale.
nanoscopy
The application of nanotechnology to the imaging of objects at nanoscale.
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.
naphtha
Any of a wide variety of aliphatic or aromatic liquid hydrocarbon mixtures distilled from petroleum or coal tar, especially as used in solvents or petrol.
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.
narrow-cut
adjectiveMining and extraction
Composed of moderately-heavy hydrocarbons with boiling points in the kerosene range, without a significant proportion of lighter, gasoline-type hydrocarbons; Jet A is an example of a fuel of this type.
narrowbody
An airliner capable of seating, at most, six or fewer passengers in a single row of economy seating, with one aisle.
NAT
Abbreviation of North Atlantic Tracks.
nav
Navigation. Often used attributively, as in nav beacon.
naval
adjectiveMarine and shipyard
Of or relating to ships in general.
Navcam
Abbreviation of navigation camera, a type of engineering camera found on certain unmanned space rovers including the Curiosity rover on Mars.
NC
adjectivePlumbing
Initialism of normally closed.
NCA
Initialism of nickel-cobalt-aluminum, a type of lithium cell chemistry.
NCAP
Initialism of nematic curvilinear aligned phase.
NCM
Initialism of nickel-cobalt-manganese, a type of lithium cell chemistry.
NCO
Initialism of numerically controlled oscillator.
ND
Initialism of navigation display.
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.
NEC
nameRail equipment
Initialism of Northeast Corridor.
neckdown
An angled narrowing of the roadway and widening of the pavement, used as a traffic calming measure.
NEDC
nameAutomotive
Initialism of New European Driving Cycle.
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 crystal
A uniaxial crystal, such as one of calcite, in which the extraordinary wave travels faster than the ordinary wave
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.
nematicon
A spatial optical soliton in a nematic liquid crystal.
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.