| hypersplenism | (noun) enlarged spleen and a decrease in one or more types of blood cells; associated with many disorders | - |
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| ilmenite | (noun) a weakly magnetic black mineral found in metamorphic and plutonic rocks; an iron titanium oxide in crystalline form; a source of titanium | - |
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| immunogenicity | (noun) the property of eliciting an immune response | - |
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| impenitence | (noun) the trait of refusing to repent | Synonyms: impenitency |
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| impenitency | (noun) the trait of refusing to repent | Synonyms: impenitence |
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| inconvenience | (noun) the quality of not being useful or convenient | - |
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| (noun) a difficulty that causes anxiety | Synonyms: troublesomeness, worriment |
| (noun) an inconvenient discomfort | Synonyms: incommodiousness |
| ingeniousness | (noun) the property of being ingenious | Synonyms: cleverness, ingenuity |
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| (noun) the power of creative imagination | Synonyms: cleverness, ingenuity, inventiveness |
| juvenile | (noun) a young person, not fully developed | Synonyms: juvenile person |
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| juvenility | (noun) the freshness and vitality characteristic of a young person | Synonyms: youth, youthfulness |
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| (noun) lacking and evidencing lack of experience of life | Synonyms: callowness, jejuneness |
| larcenist | (noun) a person who commits larceny | Synonyms: larcener |
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| leavening | (noun) an influence that works subtly to lighten or modify something | Synonyms: leaven |
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| (noun) a substance used to produce fermentation in dough or a liquid | Synonyms: leaven |
| lengthening | (noun) the act of prolonging something | Synonyms: perpetuation, prolongation, protraction |
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| lenience | (noun) lightening a penalty or excusing from a chore by judges or parents or teachers | Synonyms: leniency |
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| (noun) mercifulness as a consequence of being lenient or tolerant | Synonyms: leniency, lenity, mildness |
| (noun) a disposition to yield to the wishes of someone | Synonyms: indulgence, leniency |
| leniency | (noun) lightening a penalty or excusing from a chore by judges or parents or teachers | Synonyms: lenience |
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| (noun) mercifulness as a consequence of being lenient or tolerant | Synonyms: lenience, lenity, mildness |
| (noun) a disposition to yield to the wishes of someone | Synonyms: indulgence, lenience |
| lenitive | (noun) remedy that eases pain and discomfort | - |
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| lenity | (noun) mercifulness as a consequence of being lenient or tolerant | Synonyms: lenience, leniency, mildness |
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| leptomeninges | (noun) the two innermost layers of the meninges; cerebrospinal fluid circulates between these innermost layers | - |
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| leptomeningitis | (noun) inflammation of the leptomeninges | - |
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| lessening | (noun) a change downward | Synonyms: decrease, drop-off |
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| leucopenia | (noun) an abnormal lowering of the white blood cell count | Synonyms: leukopenia |
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| leukopenia | (noun) an abnormal lowering of the white blood cell count | Synonyms: leucopenia |
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| lightening | (noun) changing to a lighter color | Synonyms: whitening |
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| (noun) descent of the uterus into the pelvic cavity that occurs late in pregnancy; the fetus is said to have dropped | - |
| likening | (noun) the act of comparing similarities | - |
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| lilangeni | (noun) the basic unit of money in Swaziland; equal to 100 cents | - |
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| listening | (noun) the act of hearing attentively | Synonyms: hearing |
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| loosening | (noun) the act of making something less tight | Synonyms: laxation |
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| (noun) an occurrence of control or strength weakening | Synonyms: relaxation, slackening |
| lutenist | (noun) a musician who plays the lute | Synonyms: lutanist, lutist |
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| lycaenid | (noun) any of various butterflies of the family Lycaenidae | Synonyms: lycaenid butterfly |
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| lymphadenitis | (noun) inflammation of lymph nodes | - |
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| lymphocytopenia | (noun) an abnormally small number of lymphocytes in the circulating blood | Synonyms: lymphopenia |
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| lymphopenia | (noun) an abnormally small number of lymphocytes in the circulating blood | Synonyms: lymphocytopenia |
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| lysogenicity | (noun) the condition of a host bacterium that has incorporated a phage into its own genetic material | Synonyms: lysogeny |
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| lysogenisation | (noun) the process by which a bacterium acquires a phage that becomes integrated into its genome | Synonyms: lysogenization |
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| lysogenization | (noun) the process by which a bacterium acquires a phage that becomes integrated into its genome | Synonyms: lysogenisation |
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| menial | (noun) a domestic servant | - |
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| meninges | (noun) a membrane (one of 3) that envelops the brain and spinal cord | Synonyms: meninx |
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| meningioma | (noun) a tumor arising in the meninges which surround the brain and spinal cord; usually slow growing and sometimes malignant | - |
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| meningism | (noun) symptoms that mimic those of meningitis but without inflammation of the meninges | - |
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| meningitis | (noun) infectious disease characterized by inflammation of the meninges (the tissues that surround the brain or spinal cord) usually caused by a bacterial infection; symptoms include headache and stiff neck and fever and nausea | - |
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| meningocele | (noun) a congenital anomaly of the central nervous system in which a sac protruding from the brain or the spinal meninges contains cerebrospinal fluid (but no nerve tissue) | - |
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| meningoencephalitis | (noun) inflammation of the brain and spinal cord and their meninges | Synonyms: cerebromeningitis, encephalomeningitis |
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| meninx | (noun) a membrane (one of 3) that envelops the brain and spinal cord | Synonyms: meninges |
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| meniscectomy | (noun) surgical removal of the meniscus of the knee | - |
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| meniscus | (noun) (physics) the curved upper surface of a nonturbulent liquid in a vertical tube | - |
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| (noun) (optics) a lens that is concave on one side and convex on the other | - |
| (noun) (anatomy) a disk of cartilage that serves as a cushion between the ends of bones that meet at a joint | Synonyms: semilunar cartilage |
| methylphenidate | (noun) central nervous system stimulant (trade name Ritalin) used in the treatment of narcolepsy in adults and attention deficit disorder in children | Synonyms: Ritalin |
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| micropenis | (noun) an abnormally small penis | Synonyms: microphallus |
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| moistening | (noun) the act of making something slightly wet | Synonyms: dampening |
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| molybdenite | (noun) a mineral resembling graphite that is valued as the chief source of molybdenum and its compounds | - |
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| myasthenia | (noun) a chronic progressive disease characterized by chronic fatigue and muscular weakness (especially in the face and neck); caused by a deficiency of acetylcholine at the neuromuscular junctions | Synonyms: myasthenia gravis |
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| (noun) any muscular weakness | - |
| myelomeningocele | (noun) a congenital defect of the central nervous system in which a sac containing part of the spinal cord and its meninges protrude through a gap in the vertebral column; frequently accompanied by hydrocephalus and mental retardation | - |
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| neurasthenia | (noun) nervous breakdown (not in technical use) | - |
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| neurasthenic | (noun) a person suffering a nervous breakdown | - |
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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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| obscenity | (noun) an obscene act | - |
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| (noun) the trait of behaving in an obscene manner | Synonyms: bawdiness, lewdness, salaciousness, salacity |
| (noun) an offensive or indecent word or phrase | Synonyms: dirty word, filth, smut, vulgarism |
| oecumenism | (noun) a movement promoting union between religions (especially between Christian churches) | Synonyms: ecumenism |
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| olivenite | (noun) rare green to black mineral consisting of hydrated copper arsenate that is found in copper deposits | - |
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| opening | (noun) a recognized sequence of moves at the beginning of a game of chess | Synonyms: chess opening |
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| (noun) the act of opening something | - |
| (noun) becoming open or being made open | - |
| (noun) the first of a series of actions | Synonyms: first step, initiative, opening move |
| (noun) a vacant or unobstructed space that is man-made | - |
| (noun) an entrance equipped with a hatch; especially a passageway between decks of a ship | Synonyms: hatchway, scuttle |
| (noun) an aperture or hole that opens into a bodily cavity | Synonyms: orifice, porta |
| (noun) a possible alternative | Synonyms: possibility, possible action |
| (noun) the initial part of the introduction | - |
| (noun) the first performance (as of a theatrical production) | Synonyms: curtain raising, opening night |
| (noun) a ceremony accompanying the start of some enterprise | - |
| (noun) an open or empty space in or between things | Synonyms: gap |
| (noun) opportunity especially for employment or promotion | - |
| pancytopenia | (noun) an abnormal deficiency in all blood cells (red blood cells and white blood cells and platelets); usually associated with bone marrow tumor or with aplastic anemia | - |
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| paraphrenia | (noun) a form of schizophrenia characterized by delusions (of persecution or grandeur or jealousy); symptoms may include anger and anxiety and aloofness and doubts about gender identity; unlike other types of schizophrenia the patients are usually presentable and (if delusions are not acted on) may function in an apparently normal manner | Synonyms: paranoic type schizophrenia, paranoid schizophrenia, paraphrenic schizophrenia |
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| peacenik | (noun) someone who prefers negotiations to armed conflict in the conduct of foreign relations | Synonyms: dove |
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| penicillamine | (noun) a drug (trade name Cuprimine) used to treat heavy metal poisoning and Wilson's disease and severe arthritis | Synonyms: Cuprimine |
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| penicillin | (noun) any of various antibiotics obtained from Penicillium molds (or produced synthetically) and used in the treatment of various infections and diseases | - |
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| penicillinase | (noun) enzyme produced by certain bacteria that inactivates penicillin and results in resistance to that antibiotic | Synonyms: beta-lactamase |
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| peninsula | (noun) a large mass of land projecting into a body of water | - |
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| penis | (noun) the male sex organ | Synonyms: member, phallus |
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| penitence | (noun) remorse for your past conduct | Synonyms: penance, repentance |
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| penitent | (noun) (Roman Catholic Church) a person who repents for wrongdoing (a Roman Catholic may be admitted to penance under the direction of a confessor) | - |
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| penitentiary | (noun) a correctional institution for those convicted of major crimes | Synonyms: pen |
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| pheniramine | (noun) an antihistamine used in preparations to treat allergies and respiratory infections; used to treat rhinitis and skin rashes and pruritus | - |
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| philhellenism | (noun) admiration for Greece and the Greeks and Greek customs | - |
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| philhellenist | (noun) an admirer of Greece and everything Greek | Synonyms: Graecophile, philhellene |
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| phoenicophorium | (noun) latanier palm | Synonyms: genus Phoenicophorium |
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| phoenix | (noun) a legendary Arabian bird said to periodically burn itself to death and emerge from the ashes as a new phoenix; according to most versions only one phoenix lived at a time and it renewed itself every 500 years | - |
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| (noun) a large monocotyledonous genus of pinnate-leaved palms found in Asia and Africa | Synonyms: genus Phoenix |
| phrenitis | (noun) inflammation of the brain usually caused by a virus; symptoms include headache and neck pain and drowsiness and nausea and fever (`phrenitis' is no longer in scientific use) | Synonyms: cephalitis, encephalitis |
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| plenipotentiary | (noun) a diplomat who is fully authorized to represent his or her government | - |
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| plenitude | (noun) a full supply | Synonyms: plenteousness, plentifulness, plentitude, plenty |
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| primogenitor | (noun) an ancestor in the direct line | Synonyms: progenitor |
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| primogeniture | (noun) right of inheritance belongs exclusively to the eldest son | - |
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| progenitor | (noun) an ancestor in the direct line | Synonyms: primogenitor |
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| proscenium | (noun) the wall that separates the stage from the auditorium in a modern theater | Synonyms: proscenium wall |
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| (noun) the part of a modern theater stage between the curtain and the orchestra (i.e., in front of the curtain) | Synonyms: apron, forestage |
| provenience | (noun) where something originated or was nurtured in its early existence | Synonyms: birthplace, cradle, place of origin, provenance |
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| quickening | (noun) the act of accelerating; increasing the speed | Synonyms: acceleration, speedup |
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| (noun) the process of showing signs of life | - |
| (noun) the stage of pregnancy at which the mother first feels the movements of the fetus | - |
| relistening | (noun) the act of hearing again | Synonyms: rehearing |
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| renin | (noun) a proteolytic enzyme secreted by the kidneys; catalyzes the formation of angiotensin and thus affects blood pressure | - |
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| replenishment | (noun) filling again by supplying what has been used up | Synonyms: refilling, renewal, replacement |
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| rhenium | (noun) a rare heavy polyvalent metallic element that resembles manganese chemically and is used in some alloys; is obtained as a by-product in refining molybdenum | Synonyms: atomic number 75, Re |
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| ripening | (noun) coming to full development; becoming mature | Synonyms: maturation, maturement |
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| (noun) acquiring desirable qualities by being left undisturbed for some time | Synonyms: ageing, aging |
| roentgenium | (noun) a radioactive transuranic element, with atomic number 111 | Synonyms: atomic number 111, element 111, Rg |
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| ruthenium | (noun) a rare polyvalent metallic element of the platinum group; it is found associated with platinum | Synonyms: atomic number 44, Ru |
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| saligenin | (noun) Salicylic alcohol, also called saligenin, is a crystalline phenolic alcohol with the chemical formula C7H8O2, that is obtained usually by hydrolysis of salicin. | Synonyms: salicylic alcohol |
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| schizophrenia | (noun) any of several psychotic disorders characterized by distortions of reality and disturbances of thought and language and withdrawal from social contact | Synonyms: dementia praecox, schizophrenic disorder, schizophrenic psychosis |
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| schizophrenic | (noun) someone who is afflicted with schizophrenia | - |
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| sciaenid | (noun) widely distributed family of carnivorous percoid fishes having a large air bladder used to produce sound | Synonyms: sciaenid fish |
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| scorpaenid | (noun) any of numerous carnivorous usually bottom-dwelling warm-water marine fishes found worldwide but most abundant in the Pacific | Synonyms: scorpaenid fish |
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| screening | (noun) the act of concealing the existence of something by obstructing the view of it | Synonyms: cover, covering, masking |
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| (noun) testing objects or persons in order to identify those with particular characteristics | - |
| (noun) fabric of metal or plastic mesh | - |
| (noun) the display of a motion picture | Synonyms: showing, viewing |
| selenite | (noun) a compound that contains a SeO32− anion. | - |
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| selenium | (noun) a toxic nonmetallic element related to sulfur and tellurium; occurs in several allotropic forms; a stable grey metallike allotrope conducts electricity better in the light than in the dark and is used in photocells; occurs in sulfide ores (as pyrite) | Synonyms: atomic number 34, Se |
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| senility | (noun) the state of being senile | - |
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| (noun) mental infirmity as a consequence of old age; sometimes shown by foolish infatuations | Synonyms: dotage, second childhood |
| senior | (noun) an undergraduate student during the year preceding graduation | - |
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| (noun) a person who is older than you are | Synonyms: elder |
| senioritis | (noun) tiredness with the final year of high school | - |
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