| neuroepithelium | (noun) epithelium associated with special sense organs and containing sensory nerve endings | - |
|---|
| neuroticism | (noun) a mental or personality disturbance not attributable to any known neurological or organic dysfunction | Synonyms: neurosis, psychoneurosis |
|---|
| neurotropism | (noun) an affinity for neural tissues | - |
|---|
| neutralism | (noun) a policy of neutrality or nonalignment in international affairs | - |
|---|
| newsroom | (noun) a reading room (in a library or club) where newspapers and other periodicals can be read | - |
|---|
| (noun) an office in which news is processed by a newspaper or news agency or television or radio station | - |
| (noun) the staff of a newspaper or the news department of a periodical | - |
| ngultrum | (noun) the basic unit of money in Bhutan | - |
|---|
| nihilism | (noun) a revolutionary doctrine that advocates destruction of the social system for its own sake | - |
|---|
| (noun) complete denial of all established authority and institutions | - |
| (noun) the delusion that things (or everything, including the self) do not exist; a sense that everything is unreal | Synonyms: nihilistic delusion |
| nim | (noun) game in which matchsticks are arranged in rows and players alternately remove one or more of them; in some versions the object is to take the last remaining matchstick on the table and in other versions the object is to avoid taking the last remaining matchstick on the table | - |
|---|
| niobium | (noun) a soft grey ductile metallic element used in alloys; occurs in niobite; formerly called columbium | Synonyms: atomic number 41, Nb |
|---|
| nitrazepam | (noun) a hypnotic and sedative drug of the benzodiazepine type | - |
|---|
| nitrobacterium | (noun) any of the bacteria in the soil that take part in the nitrogen cycle; they oxidize ammonium compounds into nitrites or oxidize nitrites into nitrates | - |
|---|
| nitrochloroform | (noun) a heavy colorless insoluble liquid compound that causes tears and vomiting; used as a pesticide and as tear gas | Synonyms: chloropicrin |
|---|
| nm | (noun) a metric unit of length equal to one billionth of a meter | Synonyms: micromillimeter, micromillimetre, millimicron, nanometer, nanometre |
|---|
| nobelium | (noun) a radioactive transuranic element synthesized by bombarding curium with carbon ions; 7 isotopes are known | Synonyms: atomic number 102, No |
|---|
| noctambulism | (noun) walking by a person who is asleep | Synonyms: noctambulation, sleepwalking, somnambulation, somnambulism |
|---|
| nomadism | (noun) The way of life of people who, having no fixed home, move around seasonally in search of food, water and grazing etc. | - |
|---|
| nominalism | (noun) (philosophy) the doctrine that the various objects labeled by the same term have nothing in common but their name | - |
|---|
| nomogram | (noun) a graphic representation of numerical relations | Synonyms: nomograph |
|---|
| noncom | (noun) a military officer appointed from enlisted personnel | Synonyms: enlisted officer, noncommissioned officer |
|---|
| nonconformism | (noun) the practice of nonconformity | - |
|---|
| (noun) a lack of orthodoxy in thoughts or beliefs | Synonyms: nonconformance, nonconformity |
| nonrandom | (adjective) not random | - |
|---|
| nonuniform | (adjective) not homogeneous | Synonyms: inhomogeneous |
|---|
| norm | (noun) a statistic describing the location of a distribution | Synonyms: average |
|---|
| (noun) a standard or model or pattern regarded as typical | - |
| nostrum | (noun) patent medicine whose efficacy is questionable | - |
|---|
| (noun) hypothetical remedy for all ills or diseases; once sought by the alchemists | Synonyms: catholicon, cure-all, panacea |
| nucleoplasm | (noun) the protoplasm that constitutes the nucleus of a cell | Synonyms: karyoplasm |
|---|
| nudism | (noun) going without clothes as a social practice | Synonyms: naturism |
|---|
| oakum | (noun) loose hemp or jute fiber obtained by unravelling old ropes; when impregnated with tar it was used to caulk seams and pack joints in wooden ships | - |
|---|
| obiism | (noun) belief in a kind of sorcery that originated in Africa and is practiced in the West Indies | - |
|---|
| obscurantism | (noun) a deliberate act intended to make something obscure | - |
|---|
| (noun) a policy of opposition to enlightenment or the spread of knowledge | - |
| obstructionism | (noun) deliberate interference | - |
|---|
| occidentalism | (noun) the quality or customs or mannerisms characteristic of Western civilizations | - |
|---|
| occultism | (noun) a belief in supernatural powers and the possibility of bringing them under human control | - |
|---|
| (noun) the study of the supernatural | - |
| oculism | (noun) the craft of an oculist | - |
|---|
| odium | (noun) hate coupled with disgust | Synonyms: abhorrence, abomination, detestation, execration, loathing |
|---|
| (noun) state of disgrace resulting from detestable behavior | - |
| odontoglossum | (noun) any of numerous and diverse orchids of the genus Odontoglossum having racemes of few to many showy usually large flowers in many colors | - |
|---|
| oecumenism | (noun) a movement promoting union between religions (especially between Christian churches) | Synonyms: ecumenism |
|---|
| officialdom | (noun) people elected or appointed to administer a government | Synonyms: government officials |
|---|
| ohm | (noun) a unit of electrical resistance equal to the resistance between two points on a conductor when a potential difference of one volt between them produces a current of one ampere | - |
|---|
| olibanum | (noun) an aromatic gum resin obtained from various Arabian or East African trees; formerly valued for worship and for embalming and fumigation | Synonyms: frankincense, gum olibanum, thus |
|---|
| olm | (noun) European aquatic salamander with permanent external gills that lives in caves | Synonyms: Proteus anguinus |
|---|
| omasum | (noun) the third compartment of the stomach of a ruminant | Synonyms: psalterium, third stomach |
|---|
| omentum | (noun) a fold of peritoneum supporting the viscera | - |
|---|
| ommatidium | (noun) any of the numerous small cone-shaped eyes that make up the compound eyes of some arthropods | - |
|---|
| onanism | (noun) manual stimulation of the genital organs (of yourself or another) for sexual pleasure | Synonyms: masturbation |
|---|
| (noun) a method of birth control in which coitus is initiated but the penis is deliberately withdrawn before ejaculation | Synonyms: coitus interruptus, pulling out, withdrawal, withdrawal method |
| oncidium | (noun) any orchid of the genus Oncidium: characterized by slender branching sprays of small yellow and brown flowers; often grown as houseplants | Synonyms: butterfly orchid, butterfly plant, dancing lady orchid |
|---|
| oneirism | (noun) absentminded dreaming while awake | Synonyms: air castle, castle in Spain, castle in the air, daydream, daydreaming, reverie, revery |
|---|
| operationalism | (noun) (philosophy) the doctrine that the meaning of a proposition consists of the operations involved in proving or applying it | - |
|---|
| operculum | (noun) a hard flap serving as a cover for (a) the gill slits in fishes or (b) the opening of the shell in certain gastropods when the body is retracted | - |
|---|
| ophidism | (noun) poisoning by snake venom | - |
|---|
| opium | (noun) an addictive narcotic extracted from seed capsules of the opium poppy | - |
|---|
| opossum | (noun) nocturnal arboreal marsupial having a naked prehensile tail found from southern North America to northern South America | Synonyms: possum |
|---|
| (noun) small furry Australian arboreal marsupials having long usually prehensile tails | Synonyms: phalanger, possum |
| opportunism | (noun) taking advantage of opportunities without regard for the consequences for others | Synonyms: expedience, self-interest, self-seeking |
|---|
| opprobrium | (noun) a state of extreme dishonor | Synonyms: infamy |
|---|
| (noun) state of disgrace resulting from public abuse | Synonyms: obloquy |
| optimism | (noun) a general disposition to expect the best in all things | - |
|---|
| (noun) the optimistic feeling that all is going to turn out well | - |
| optimum | (adjective) most desirable possible under a restriction expressed or implied | Synonyms: optimal |
|---|
| (noun) most favorable conditions or greatest degree or amount possible under given circumstances | - |
| organicism | (noun) theory that the total organization of an organism rather than the functioning of individual organs is the determinant of life processes | - |
|---|
| organism | (noun) a living thing that has (or can develop) the ability to act or function independently | Synonyms: being |
|---|
| (noun) a system considered analogous in structure or function to a living body | - |
| orgasm | (noun) the moment of most intense pleasure in sexual intercourse | Synonyms: climax, coming, sexual climax |
|---|
| orientalism | (noun) the quality or customs or mannerisms characteristic of Asian civilizations | - |
|---|
| origanum | (noun) any of various fragrant aromatic herbs of the genus Origanum used as seasonings | - |
|---|
| originalism | (noun) the belief that the United States Constitution should be interpreted in the way the authors originally intended it | - |
|---|
| ornamentalism | (noun) the practice of ornamental display | - |
|---|
| oscillogram | (noun) the recording produced by an oscillograph | - |
|---|
| osmiridium | (noun) a hard and corrosion resistant mineral that is a natural alloy of osmium and iridium (usually containing small amounts of rhodium and platinum); used in needles and pen nibs etc. | Synonyms: iridosmine |
|---|
| osmium | (noun) a hard brittle blue-grey or blue-black metallic element that is one of the platinum metals; the heaviest metal known | Synonyms: atomic number 76, Os |
|---|
| ossiculum | (noun) a small bone; especially one in the middle ear | Synonyms: bonelet, ossicle |
|---|
| ostensorium | (noun) (Roman Catholic Church) a vessel (usually of gold or silver) in which the consecrated Host is exposed for adoration | Synonyms: monstrance |
|---|
| ostracism | (noun) the act of excluding someone from society by general consent | - |
|---|
| (noun) the state of being banished or ostracized (excluded from society by general consent) | Synonyms: banishment, Coventry |
| ostracoderm | (noun) extinct fish-like jawless vertebrate having a heavily armored body; of the Paleozoic | - |
|---|
| outperform | (verb) be or do something to a greater degree | Synonyms: exceed, outdo, outgo, outmatch, outstrip, surmount, surpass |
|---|
| overarm | (adjective) with hand brought forward and down from above shoulder level | Synonyms: overhand, overhanded |
|---|
| overwhelm | (verb) charge someone with too many tasks | Synonyms: deluge, flood out |
|---|
| (verb) overcome by superior force | Synonyms: overmaster, overpower |
| (verb) cover completely or make imperceptible | Synonyms: drown, submerge |
| (verb) overcome, as with emotions or perceptual stimuli | Synonyms: overcome, overpower, overtake, sweep over, whelm |
| oviform | (adjective) rounded like an egg | Synonyms: egg-shaped, elliptic, elliptical, oval-shaped, oval, ovate, ovoid, prolate |
|---|
| ovum | (noun) the female reproductive cell; the female gamete | Synonyms: egg cell |
|---|
| oxazepam | (noun) a tranquilizing drug (trade name Serax) used to treat anxiety and insomnia and alcohol withdrawal | Synonyms: Serax |
|---|
| pablum | (noun) worthless or oversimplified ideas | Synonyms: pap |
|---|
| pabulum | (noun) insipid intellectual nourishment | - |
|---|
| (noun) any substance that can be used as food | Synonyms: comestible, eatable, edible, victual, victuals |
| pachyderm | (noun) any of various nonruminant hoofed mammals having very thick skin: elephant, rhinoceros, hippopotamus | - |
|---|
| pacificism | (noun) the doctrine that all violence is unjustifiable | Synonyms: pacifism, passivism |
|---|
| (noun) the belief that all international disputes can be settled by arbitration | Synonyms: pacifism |
| pacifism | (noun) the doctrine that all violence is unjustifiable | Synonyms: pacificism, passivism |
|---|
| (noun) the belief that all international disputes can be settled by arbitration | Synonyms: pacificism |
| paganism | (noun) any of various religions other than Christianity or Judaism or Islamism | Synonyms: heathenism, pagan religion |
|---|
| paleocerebellum | (noun) the anterior lobe of the cerebellum which was one of the earliest parts of the hindbrain to develop in mammals | - |
|---|
| paleostriatum | (noun) the inner pale yellow part of the lenticular nucleus | Synonyms: globus pallidus, pallidum |
|---|
| palladium | (noun) a silver-white metallic element of the platinum group that resembles platinum; occurs in some copper and nickel ores; does not tarnish at ordinary temperatures and is used (alloyed with gold) in jewelry | Synonyms: atomic number 46, Pd |
|---|
| pallidum | (noun) the inner pale yellow part of the lenticular nucleus | Synonyms: globus pallidus, paleostriatum |
|---|
| pallium | (noun) cloak or mantle worn by men in ancient Rome | - |
|---|
| (noun) (Roman Catholic Church) vestment consisting of a band encircling the shoulders with two lappets hanging in front and back | - |
| (noun) (zoology) a protective layer of epidermis in mollusks or brachiopods that secretes a substance forming the shell | Synonyms: mantle |
| (noun) the layer of unmyelinated neurons (the grey matter) forming the cortex of the cerebrum | Synonyms: cerebral cortex, cerebral mantle, cortex |
| palm | (noun) the inner surface of the hand from the wrist to the base of the fingers | Synonyms: thenar |
|---|
| (noun) an award for winning a championship or commemorating some other event | Synonyms: decoration, laurel wreath, medal, medallion, ribbon |
| (noun) any plant of the family Palmae having an unbranched trunk crowned by large pinnate or palmate leaves | Synonyms: palm tree |
| (noun) a linear unit based on the length or width of the human hand | - |
| (verb) touch, lift, or hold with the hands | Synonyms: handle |
| pandeism | (noun) the belief that God created the universe and its phenomena by becoming the universe, thereafter the sole manifestation of God | - |
|---|
| pandemonium | (noun) a state of extreme confusion and disorder | Synonyms: bedlam, chaos, topsy-turvydom, topsy-turvyness |
|---|
| panduriform | (adjective) (of a leaf shape) having rounded ends and a contracted center | Synonyms: fiddle-shaped, pandurate |
|---|
| panentheism | (noun) the belief that God is in part of the universe and its phenomena and also transcends the universe and intervenes in its operations | - |
|---|
| panjandrum | (noun) an important or influential (and often overbearing) person | Synonyms: dignitary, high-up, high muckamuck, very important person, VIP |
|---|
| pantheism | (noun) the doctrine or belief that God is the universe and its phenomena (taken or conceived of as a whole) or the doctrine that regards the universe as a manifestation of God | - |
|---|
| (noun) (rare) worship that admits or tolerates all gods | - |
| papilliform | (adjective) shaped like a papilla | - |
|---|
| papism | (noun) offensive terms for the practices and rituals of the Roman Catholic Church | Synonyms: popery |
|---|
| (noun) the beliefs and practices of the Catholic Church based in Rome | Synonyms: Roman Catholicism, Romanism |
| paracosm | (noun) a prolonged fantasy world invented by children; can have a definite geography and language and history | - |
|---|
| paradigm | (noun) a standard or typical example | Synonyms: epitome, image, prototype |
|---|
| (noun) the generally accepted perspective of a particular discipline at a given time | - |
| (noun) the class of all items that can be substituted into the same position (or slot) in a grammatical sentence (are in paradigmatic relation with one another) | Synonyms: substitution class |
| (noun) systematic arrangement of all the inflected forms of a word | - |
| paragram | (noun) a pun made by changing the letters of a word, especially the initial letter. | - |
|---|
| parallelism | (noun) similarity by virtue of corresponding | Synonyms: correspondence |
|---|
| parallelogram | (noun) a quadrilateral whose opposite sides are both parallel and equal in length | - |
|---|