| neurolemma | (noun) thin membranous sheath around a nerve fiber | Synonyms: neurilemma |
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| neuroleptic | (noun) tranquilizer used to treat psychotic conditions when a calming effect is desired | Synonyms: antipsychotic, antipsychotic agent, antipsychotic drug, major tranquilizer, major tranquilliser, major tranquillizer, neuroleptic agent, neuroleptic drug |
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| neurolinguist | (noun) someone trained in neuroscience and linguistics who studies brain processes during language production and reception | - |
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| neurolinguistics | (noun) the branch of linguistics that studies the relation between language and the structure and function of the nervous system | - |
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| neurologist | (noun) a medical specialist in the nervous system and the disorders affecting it | Synonyms: brain doctor |
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| neurology | (noun) the branch of medical science that deals with the nervous system | - |
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| (noun) (neurology) the branch of medicine that deals with the nervous system and its disorders | Synonyms: clinical neurology |
| neurolysin | (noun) any toxin that affects neural tissues | Synonyms: neurotoxin |
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| neuroma | (noun) any tumor derived from cells of the nervous system | - |
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| neuromarketing | (noun) marketing based on studies of consumers' sensorimotor, cognitive, and affective responses | Synonyms: neuro-marketing |
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| neuron | (noun) a cell that is specialized to conduct nerve impulses | Synonyms: nerve cell |
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| neuropathy | (noun) any pathology of the peripheral nerves | - |
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| neurophysiology | (noun) the branch of neuroscience that studies the physiology of the nervous system | - |
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| neuropil | (noun) the complex network of unmyelinated axones, dendrites, and glial branches that form the bulk of the central nervous system's grey matter and in which nerve cell bodies are embedded | Synonyms: neuropile |
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| neuropile | (noun) the complex network of unmyelinated axones, dendrites, and glial branches that form the bulk of the central nervous system's grey matter and in which nerve cell bodies are embedded | Synonyms: neuropil |
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| neuroplasty | (noun) plastic surgery of the nerves | - |
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| neuropsychiatry | (noun) the branch of medicine dealing with mental disorders attributable to diseases of the nervous system | - |
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| neuropsychology | (noun) the branch of psychology that is concerned with the physiological bases of psychological processes | Synonyms: physiological psychology, psychophysiology |
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| neuropteran | (noun) insect having biting mouthparts and four large membranous wings with netlike veins | Synonyms: neuropteron, neuropterous insect |
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| neuropteron | (noun) insect having biting mouthparts and four large membranous wings with netlike veins | Synonyms: neuropteran, neuropterous insect |
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| neurosarcoma | (noun) a malignant neoplasm of nerve tissue and fibrous tissue and connective tissue | Synonyms: malignant neuroma |
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| neuroscience | (noun) the scientific study of the nervous system | - |
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| neuroscientist | (noun) a neurobiologist who specializes in the study of the brain | - |
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| neurosis | (noun) a mental or personality disturbance not attributable to any known neurological or organic dysfunction | Synonyms: neuroticism, psychoneurosis |
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| neurosurgeon | (noun) someone who does surgery on the nervous system (especially the brain) | Synonyms: brain surgeon |
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| neurosurgery | (noun) any surgery that involves the nervous system (brain or spinal cord or peripheral nerves) | - |
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| neurosyphilis | (noun) syphilis of the central nervous system | - |
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| neurotic | (noun) a person suffering from neurosis | Synonyms: mental case, psychoneurotic |
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| neuroticism | (noun) a mental or personality disturbance not attributable to any known neurological or organic dysfunction | Synonyms: neurosis, psychoneurosis |
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| neurotoxin | (noun) any toxin that affects neural tissues | Synonyms: neurolysin |
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| neurotransmitter | (noun) a neurochemical that transmits nerve impulses across a synapse | - |
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| neurotropism | (noun) an affinity for neural tissues | - |
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| neuter | (noun) a gender that refers chiefly (but not exclusively) to inanimate objects (neither masculine nor feminine) | - |
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| neutering | (noun) the sterilization of an animal | Synonyms: altering, fixing |
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| neutral | (noun) one who does not side with any party in a war or dispute | - |
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| neutralisation | (noun) action intended to nullify the effects of some previous action | Synonyms: counteraction, neutralization |
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| (noun) action intended to keep a country politically neutral or exclude it from a possible war | Synonyms: neutralization |
| (noun) (euphemism) the removal of a threat by killing or destroying it (especially in a covert operation or military operation) | Synonyms: neutralization |
| (noun) a chemical reaction in which an acid and a base interact with the formation of a salt; with strong acids and bases the essential reaction is the combination of hydrogen ions with hydroxyl ions to form water | Synonyms: neutralisation reaction, neutralization, neutralization reaction |
| neutralism | (noun) a policy of neutrality or nonalignment in international affairs | - |
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| neutralist | (noun) an advocate of neutrality in international affairs | - |
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| neutrality | (noun) nonparticipation in a dispute or war | - |
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| (noun) pH value of 7 | - |
| (noun) tolerance attributable to a lack of involvement | Synonyms: disinterest |
| neutralization | (noun) action intended to nullify the effects of some previous action | Synonyms: counteraction, neutralisation |
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| (noun) action intended to keep a country politically neutral or exclude it from a possible war | Synonyms: neutralisation |
| (noun) (euphemism) the removal of a threat by killing or destroying it (especially in a covert operation or military operation) | Synonyms: neutralisation |
| (noun) a chemical reaction in which an acid and a base interact with the formation of a salt; with strong acids and bases the essential reaction is the combination of hydrogen ions with hydroxyl ions to form water | Synonyms: neutralisation, neutralisation reaction, neutralization reaction |
| neutrino | (noun) an elementary, electrically neutral particle with a very small mass | - |
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| neutron | (noun) an elementary particle with 0 charge and mass about equal to a proton; enters into the structure of the atomic nucleus | - |
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| neutropenia | (noun) leukopenia in which the decrease is primarily in number of neutrophils (the chief phagocytic leukocyte) | - |
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| neutrophil | (noun) the chief phagocytic leukocyte; stains with either basic or acid dyes | Synonyms: neutrophile |
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| neutrophile | (noun) the chief phagocytic leukocyte; stains with either basic or acid dyes | Synonyms: neutrophil |
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| nucleus | (noun) a part of the cell containing DNA and RNA and responsible for growth and reproduction | Synonyms: cell nucleus, karyon |
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| (noun) any histologically identifiable mass of neural cell bodies in the brain or spinal cord | - |
| (noun) the central structure of the lens that is surrounded by the cortex | Synonyms: lens nucleus |
| (noun) a small group of indispensable persons or things | Synonyms: core, core group |
| (noun) the positively charged dense center of an atom | - |
| (noun) (astronomy) the center of the head of a comet; consists of small solid particles of ice and frozen gas that vaporizes on approaching the sun to form the coma and tail | - |
| oeuvre | (noun) the total output of a writer or artist (or a substantial part of it) | Synonyms: body of work, work |
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| pasteurellosis | (noun) an acute infectious disease characterized by pneumonia and blood infection | Synonyms: hemorrhagic septicemia |
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| pasteurisation | (noun) partial sterilization of foods at a temperature that destroys harmful microorganisms without major changes in the chemistry of the food | Synonyms: pasteurization |
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| pasteuriser | (noun) an apparatus for pasteurizing substances (especially milk). | Synonyms: pasteurizer |
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| pasteurization | (noun) partial sterilization of foods at a temperature that destroys harmful microorganisms without major changes in the chemistry of the food | Synonyms: pasteurisation |
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| pasteurizer | (noun) an apparatus for pasteurizing substances (especially milk). | Synonyms: pasteuriser |
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| perineum | (noun) the general region between the anus and the genital organs | - |
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| perineurium | (noun) the sheath of connective tissue that covers a bundle of nerve fibers | - |
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| periosteum | (noun) a dense fibrous membrane covering the surface of bones (except at their extremities) and serving as an attachment for tendons and muscles; contains nerves and blood vessels that nourish the enclosed bone | - |
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| peritoneum | (noun) a transparent membrane that lines the abdominal cavity in mammals and covers most of the viscera | - |
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| peroneus | (noun) muscle of the lower leg that is involved in moving the foot | - |
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| petroleum | (noun) a dark oil consisting mainly of hydrocarbons | Synonyms: crude, crude oil, fossil oil, oil, rock oil |
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| pharmaceutic | (noun) drug or medicine that is prepared or dispensed in pharmacies and used in medical treatment | Synonyms: pharmaceutical |
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| pharmaceutical | (noun) drug or medicine that is prepared or dispensed in pharmacies and used in medical treatment | Synonyms: pharmaceutic |
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| pharmaceutics | (noun) the art and science of preparing and dispensing drugs and medicines | Synonyms: pharmacy |
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| pileup | (noun) multiple collisions of vehicles | - |
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| pileus | (noun) a fruiting structure resembling an umbrella or a cone that forms the top of a stalked fleshy fungus such as a mushroom | Synonyms: cap |
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| pleura | (noun) the thin serous membrane around the lungs and inner walls of the chest | - |
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| pleuralgia | (noun) pain in the chest caused by inflammation of the muscles between the ribs | Synonyms: costalgia, pleurodynia |
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| pleurisy | (noun) inflammation of the pleura of the lungs (especially the parietal layer) | - |
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| pleurocarp | (noun) a moss having the archegonium or antheridium on a short side branch rather than the main stalk | Synonyms: pleurocarpous moss |
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| pleurodont | (noun) an animal having teeth fused with the inner surface of the alveolar ridge without sockets | - |
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| pleurodynia | (noun) pain in the chest caused by inflammation of the muscles between the ribs | Synonyms: costalgia, pleuralgia |
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| pleuropneumonia | (noun) pleurisy and pneumonia | - |
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| pleurothallis | (noun) any of numerous small tufted orchids of the genus Pleurothallis having leathery to fleshy leaves and racemes of 1 to many small flowers | - |
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| pneumatics | (noun) the branch of mechanics that deals with the mechanical properties of gases | - |
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| pneumatophore | (noun) an air-filled root (submerged or exposed) that can function as a respiratory organ of a marsh or swamp plant | - |
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| pneumococcus | (noun) bacterium causing pneumonia in mice and humans | Synonyms: Diplococcus pneumoniae |
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| pneumoconiosis | (noun) chronic respiratory disease caused by inhaling metallic or mineral particles | Synonyms: pneumonoconiosis |
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| pneumocytosis | (noun) pneumonia occurring in infants or in persons with impaired immune systems (as AIDS victims) | Synonyms: interstitial plasma cell pneumonia, pneumocystis carinii pneumonia, pneumocystis pneumonia |
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| pneumoencephalogram | (noun) an X ray of the brain made by replacing spinal fluid with a gas (usually oxygen) to improve contrast | Synonyms: encephalogram |
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| pneumogastric | (noun) a mixed nerve that supplies the pharynx and larynx and lungs and heart and esophagus and stomach and most of the abdominal viscera | Synonyms: nervus vagus, pneumogastric nerve, tenth cranial nerve, vagus, vagus nerve, wandering nerve |
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| pneumonectomy | (noun) surgical removal of a lung (usually to treat lung cancer) | - |
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| pneumonia | (noun) respiratory disease characterized by inflammation of the lung parenchyma (excluding the bronchi) with congestion caused by viruses or bacteria or irritants | - |
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| pneumonitis | (noun) inflammation of the lungs; caused by a virus or an allergic reaction | - |
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| pneumonoconiosis | (noun) chronic respiratory disease caused by inhaling metallic or mineral particles | Synonyms: pneumoconiosis |
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| pneumothorax | (noun) abnormal presence of air in the pleural cavity resulting in the collapse of the lung; may be spontaneous (due to injury to the chest) or induced (as a treatment for tuberculosis) | - |
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| polyneuritis | (noun) inflammation of many or all of the peripheral nerves (as in leprosy) | Synonyms: multiple neuritis |
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| poseur | (noun) a person who habitually pretends to be something he is not | Synonyms: poser |
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| poseuse | (noun) a woman poseur | - |
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| pronucleus | (noun) the nucleus of the ovum or sperm after fertilization but before they fuse to form the nucleus of the zygote | - |
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| propaedeutic | (noun) a course that provides an introduction to an art or science (or to more advanced study generally) | Synonyms: propaedeutics |
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| propaedeutics | (noun) a course that provides an introduction to an art or science (or to more advanced study generally) | Synonyms: propaedeutic |
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| provocateur | (noun) a secret agent who incites suspected persons to commit illegal acts | Synonyms: agent provocateur |
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| pseud | (noun) a person who makes deceitful pretenses | Synonyms: fake, faker, fraud, imposter, impostor, pretender, pseudo, role player, sham, shammer |
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| pseudo | (noun) a person who makes deceitful pretenses | Synonyms: fake, faker, fraud, imposter, impostor, pretender, pseud, role player, sham, shammer |
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| pseudobulb | (noun) a solid bulblike enlargement of the stem of some orchids | - |
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| pseudocarp | (noun) fruit containing much fleshy tissue besides that of the ripened ovary; as apple or strawberry | Synonyms: accessory fruit |
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| pseudocyesis | (noun) physiological state in which a woman exhibits symptoms of pregnancy but is not pregnant | Synonyms: false pregnancy |
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| pseudoephedrine | (noun) poisonous crystalline alkaloid occurring with ephedrine and isomorphic with it | - |
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| pseudohallucination | (noun) an image vivid enough to be a hallucination but recognized as unreal | - |
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| pseudohermaphrodite | (noun) someone having external genitalia of one sex and internal sex organs of the other sex; not a true hermaphrodite because there is no ambiguity in the sex of the external genitalia and hence no question about gender at birth | - |
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| pseudohermaphroditism | (noun) congenital condition in which a person has external genitalia of one sex and internal sex organs of the other sex | - |
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| pseudomonad | (noun) bacteria usually producing greenish fluorescent water-soluble pigment; some pathogenic for plants and animals | - |
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| pseudonym | (noun) a fictitious name used when the person performs a particular social role | Synonyms: anonym, nom de guerre |
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