Glossary · Nouns · N
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TermTypeDefinitionClassificationsUpdated
Nuclear MeltdownnounMWEsevere overheating of the core of a nuclear reactor resulting in the core melting and radiation escapingverified
Nuclear PhysicsnounMWEthe branch of physics that studies the internal structure of atomic nucleiverified
Nuclear PowernounMWEnuclear energy regarded as a source of electricity for the power grid (for civilian use)verified
Nuclear PropulsionnounMWEthe use of a nuclear reactor either to produce electricity to power an engine (as in a nuclear submarine) or to directly heat a propellant (as in nuclear rockets)verified
Nuclear ReactionnounMWE(physics) a process that alters the energy or structure or composition of atomic nucleiverified
Nuclear ReactornounMWE(physics) any of several kinds of apparatus that maintain and control a nuclear reaction for the production of energy or artificial elementsverified
Nuclear ResonancenounMWEthe resonance absorption of a gamma ray by a nucleus identical to the nucleus that emitted the gamma rayverified
Nuclear RocketnounMWEa rocket engine in which a nuclear reactor is used to heat a propellantverified
Nuclear TerrorismnounMWEthe use of a nuclear device by a terrorist organization to cause massive devastation or the use (or threat of use) of fissionable radioactive materialsverified
Nuclear TransplantationnounMWEmoving a cell nucleus and its genetic material from one cell to anotherverified
Nuclear WeaponnounMWEa weapon of mass destruction whose explosive power derives from a nuclear reactionverified
Nuclear WinternounMWEa long period of darkness and extreme cold that scientists predict would follow a full-scale nuclear warverified
Nuclear-Powered ShipnounMWEship whose motive power comes from the energy of a nuclear reactorverified
Nucleasenoungeneral term for enzymes that catalyze the hydrolysis of nucleic acid by cleaving chains of nucleotides into smaller unitsverified
Nucleic AcidnounMWE(biochemistry) any of various macromolecules composed of nucleotide chains that are vital constituents of all living cellsverified
Nucleolar OrganisernounMWEthe particular part of a chromosome that is associated with a nucleolus after nuclear divisionverified
Nucleolar OrganizernounMWEthe particular part of a chromosome that is associated with a nucleolus after nuclear divisionverified
Nucleolus OrganisernounMWEthe particular part of a chromosome that is associated with a nucleolus after nuclear divisionverified
Nucleolus OrganizernounMWEthe particular part of a chromosome that is associated with a nucleolus after nuclear divisionverified
Nucleusnounany histologically identifiable mass of neural cell bodies in the brain or spinal cordverified
Nude MousenounMWEa mouse with a genetic defect that prevents them from growing hair and also prevents them from immunologically rejecting human cells and tissuesverified
Nudibranchnounany of various marine gastropods of the suborder Nudibranchia having a shell-less and often beautifully colored bodyverified
Nuisancenoun(law) a broad legal concept including anything that disturbs the reasonable use of your property or endangers life and health or is offensiveverified
Nuisance AbatementnounMWE(law) the removal or termination or destruction of something that has been found to be a nuisanceverified
Nuisance TaxnounMWEa tax based on the cost of the item purchased and collected directly from the buyerverified
NullnounDummy letter, letter symbol, or code group inserted into an encrypted message to delay or prevent its decryption or to complete encrypted groups for transmission or transmission security purposes.Control
Null SessionnounMWEKnown as Anonymous Logon, it is a way of letting an anonymous user retrieve information such as user names and shares over the network or connect without authentication. It is used by applications such as explorer.exe to enumerate shares on remote servers.VulnerabilityRegulated
Nullificationnounthe states'-rights doctrine that a state can refuse to recognize or to enforce a federal law passed by the United States Congressverified
Numbatnounsmall Australian marsupial having long snout and strong claws for feeding on termitesverified
Number AgreementnounMWEagreement in number between words in the same grammatical construction (e.g., between adjectives and the nouns they modify)verified
Number CrunchernounMWEa computer capable of performing a large number of mathematical operations per secondverified
Numberplatenouna plate mounted on the front and back of car and bearing the car's registration numberverified
Numbfishnounany sluggish bottom-dwelling ray of the order Torpediniformes having a rounded body and electric organs on each side of the head capable of emitting strong electric dischargesverified
Numennouna spirit believed to inhabit an object or preside over a place (especially in ancient Roman religion)verified
Numerical AnalysisnounMWE(mathematics) the branch of mathematics that studies algorithms for approximating solutions to problems in the infinitesimal calculusverified