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Inejirō Asanuma
Inejirō Asanuma (浅沼稲次郎, 1898–1960), Japanese Socialist Party chairman and anti-Security Treaty leader; led the 1959 JSP delegation to China, calling American imperialism the common enemy of Japan and China; assassinated on televised stage by Otoya Yamaguchi, 12 October 1960.
Inelastic collision
An inelastic collision is a collision in which kinetic energy is not conserved, being converted to heat, deformation, sound, or internal excitation, while momentum is conserved.
Inelastic electron scattering
Inelastic electron scattering is a family of electron microscopy and spectroscopy techniques in which electrons transfer energy to a sample, revealing composition, bonding, and excitations.
Inelastic electron tunneling spectroscopy
Inelastic electron tunneling spectroscopy (IETS) is an all-electronic technique producing vibrational spectra from electrons tunneling through a junction or molecule, introduced by Jaklevic and Lambe in 1966.
Inelastic neutron scattering
Inelastic neutron scattering is an experimental technique where neutrons exchange energy and momentum with a material, directly measuring excitations such as phonons and magnons in solids.
Inelastic X-ray scattering
Inelastic X-ray scattering (IXS) is a measurement technique in which X-ray photons transfer energy and momentum to a sample, revealing its atomic and electronic dynamics such as phonons.
Ineni
Ineni, also rendered Anena or Anna, was an Egyptian official of Dynasty 18 who directed the granaries of Amun and the king's works at Thebes under Amenhotep I and later kings.
Ineos
Ineos, also known as Ineos Group, is a privately held global chemicals manufacturer founded by Jim Ratcliffe in 1998, operating more than 170 sites in 32 countries and making Grenadier vehicles.
INEOS FPS
INEOS FPS is the INEOS-owned company that operates the Forties Pipeline System, which transports North Sea oil and gas liquids to the Kinneil Terminal at Grangemouth, Scotland.
Ineos Fusilier
The Ineos Fusilier is a four-wheel-drive electric SUV announced by Ineos Automotive in 2024, planned with battery-electric and range-extender powertrains but paused in July 2024.
Ineos Grenadier
The Ineos Grenadier is a four-wheel-drive off-road vehicle produced by INEOS Automotive since 2022, conceived by Jim Ratcliffe as a successor in spirit to the original Land Rover Defender.
Ineos Grenadiers
Ineos Grenadiers is a British professional cycling team at UCI WorldTour level, owned by INEOS and raced as Team Sky from 2010, with seven Tour de France wins.
Inequality (mathematics)
An inequality, or mathematical inequality, is a mathematical relation stating that one quantity is greater than or less than another, written with the symbols , ≤, and ≥.
INERATEC
INERATEC is a German e-fuels company founded in 2016 as a spin-off from the Karlsruhe Institute of Technology that builds modular reactors turning hydrogen and CO2 into synthetic fuels.
Inert anode aluminium smelting
Inert anode aluminium smelting is a variant of the Hall-Héroult process in which non-consumable anodes release oxygen, eliminating direct carbon dioxide emissions from aluminum production.
Inert gas
An inert gas is a gas that does not react chemically under particular conditions; examples include nitrogen at ordinary temperatures and the noble gases helium, neon, argon, krypton, xenon, and radon.
Inert gas asphyxiation
Inert gas asphyxiation: death from hypoxia when nitrogen, helium, or argon displaces oxygen in breathed air. Covers occupational accidents, CSB data, forensic detection, suicide, and Alabama's nitrogen executions.
Inert gas blanketing
Inert gas blanketing maintains a nitrogen or argon atmosphere over vessel contents to protect air- and moisture-sensitive materials, using tools such as Schlenk lines and glove boxes.
Inert gas welding
Inert gas welding, covering TIG and MIG, joins metals by melting them with an electric arc shielded by inert argon or helium gas, preventing porous, weak welds.
Inert matrix fuel
Inert matrix fuel (IMF) is a uranium-free nuclear fuel that embeds plutonium in an inert matrix such as stabilized zirconia, burning it without breeding new plutonium.
Inertia
Inertia, also called the principle of inertia, is the tendency of an object to keep its state of motion unless a force acts, measured by mass.
Inertia (Pendulum album)
Inertia is Pendulum's fourth studio album, released 22 August 2025 on Mushroom/Virgin, its first in 15 years after Immersion; 16 tracks, 54 minutes, produced by Rob Swire and Owen Charles with guests including Bullet For My Valentine and AWOLNATION.
Inertia constant
The inertia constant (H) measures the kinetic energy stored in a synchronous generator's rotating mass, expressed in seconds, and governs how fast grid frequency changes.
Inertia operation
Inertia operation is a semi-automatic firearm operating principle, used chiefly in shotguns, in which recoil energy cycles the action through a spring-loaded, two-piece bolt instead of gas.
Inertia tensor
The inertia tensor is the symmetric 3×3 matrix relating a rigid body's angular momentum to its angular velocity; diagonalized about its principal axes, it gives three moments of inertia.
Inertial confinement fusion
Inertial confinement fusion (ICF), also called laser fusion, compresses small fuel capsules with intense driver energy so the fuel fuses briefly; the NIF first achieved ignition in 2022.
Inertial confinement fusion target
An inertial confinement fusion (ICF) target is the millimeter-scale assembly of fuel capsule and hohlraum that a laser compresses to thermonuclear conditions in a single brief implosion.
Inertial electrostatic confinement
Inertial electrostatic confinement (IEC), developed by Philo Farnsworth and Robert Hirsch in the 1960s, is a fusion scheme using electrostatic potential wells, used mainly as a compact neutron source.
Inertial frame of reference
An inertial frame of reference, or inertial reference frame, is a reference frame in which Newton's laws hold, such as one moving at constant velocity relative to it.
Inertial fusion power plant
An inertial fusion power plant is a proposed electric generating station that ignites fusion fuel capsules repeatedly with a high-power driver and converts the released energy to electricity.