| hydrolize | (verb) make a compound react with water and undergo hydrolysis | Synonyms: hydrolise |
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| hydrologist | (noun) a geologist skilled in hydrology | - |
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| hydrology | (noun) the branch of geology that studies water on the earth and in the atmosphere: its distribution and uses and conservation | - |
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| hydrolysate | (noun) a product of hydrolysis | - |
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| hydrolyse | (verb) undergo hydrolysis; decompose by reacting with water | Synonyms: hydrolyze |
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| hydrolysis | (noun) a chemical reaction in which water reacts with a compound to produce other compounds; involves the splitting of a bond and the addition of the hydrogen cation and the hydroxide anion from the water | - |
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| hydrolyzable | (adjective) capable of undergoing hydrolysis | - |
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| hydrolyze | (verb) undergo hydrolysis; decompose by reacting with water | Synonyms: hydrolyse |
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| hydroxyproline | (noun) a crystalline amino acid obtained from gelatin or collagen | - |
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| hypercholesterolemia | (noun) the presence of an abnormal amount of cholesterol in the cells and plasma of the blood; associated with the risk of atherosclerosis | Synonyms: hypercholesteremia |
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| jellyroll | (noun) thin sheet of sponge cake spread with jelly and then rolled up to make a cylindrical cake | Synonyms: Swiss roll |
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| ketorolac | (noun) nonsteroidal anti-inflammatory (trade name Torodal) that is given only orally | Synonyms: Torodal |
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| lepidopterologist | (noun) an entomologist who specializes in the collection and study of butterflies and moths | Synonyms: butterfly collector, lepidopterist |
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| lepidopterology | (noun) the branch of entomology dealing with Lepidoptera | Synonyms: lepidoptery |
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| logroll | (verb) work toward the passage of some legislation by exchanging political favors such as trading votes | - |
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| logrolling | (noun) rotating a log rapidly in the water (as a competitive sport) | Synonyms: birling |
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| (noun) act of exchanging favors for mutual gain; especially trading of influence or votes among legislators to gain passage of certain projects | - |
| lumpenproletariat | (noun) (Marxism) the unorganized lower levels of the proletariat who are not interested in revolutionary advancement | - |
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| megestrol | (noun) a synthetic progestational compound used to treat endometrial carcinoma | Synonyms: megestrol acetate |
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| meteorologic | (adjective) of or pertaining to atmospheric phenomena, especially weather and weather conditions | Synonyms: meteoric, meteorological |
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| meteorological | (adjective) of or pertaining to atmospheric phenomena, especially weather and weather conditions | Synonyms: meteoric, meteorologic |
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| meteorologically | (adverb) with respect to the weather | - |
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| meteorologist | (noun) a specialist who studies processes in the earth's atmosphere that cause weather conditions | - |
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| meteorology | (noun) the earth science dealing with phenomena of the atmosphere (especially weather) | - |
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| (noun) predicting what the weather will be | Synonyms: weather forecasting |
| metoprolol | (noun) beta blocker (trade name Lopressor) used in treating hypertension and angina and arrhythmia and acute myocardial infarction; has adverse side effects (depression and exacerbation of congestive heart failure etc.) | Synonyms: Lopressor |
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| metrological | (adjective) of or relating to metrology | - |
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| metrology | (noun) the scientific study of measurement | - |
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| mycosterol | (noun) a kind of sterol found in fungi. | - |
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| nandrolone | (noun) an androgen (trade names Durabolin or Kabolin) that is used to treat testosterone deficiency or breast cancer or osteoporosis | Synonyms: Durabolin, Kabolin |
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| natrolite | (noun) a group of minerals of the zeolite family consisting of a hydrous silicate of sodium and aluminum | - |
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| necrolatry | (noun) superstitious worship or veneration of the dead. | - |
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| necrology | (noun) a notice of someone's death; usually includes a short biography | Synonyms: obit, obituary |
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| (noun) a list of people who died recently | - |
| necrolysis | (noun) disintegration and dissolution of dead tissue | - |
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| nephrolith | (noun) a calculus formed in the kidney | Synonyms: kidney stone, renal calculus, urinary calculus |
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| nephrolithiasis | (noun) the presence of kidney stones (calculi) in the kidney | Synonyms: renal lithiasis |
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| nephrology | (noun) the branch of medicine concerned with the kidney - its development and anatomy and physiology and disorders | - |
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| 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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| neurologic | (adjective) of or relating to or used in or practicing neurology | Synonyms: neurological |
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| neurological | (adjective) of or relating to or used in or practicing neurology | Synonyms: neurologic |
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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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| nonproliferation | (noun) the prevention of something increasing or spreading (especially the prevention of an increase in the number of countries possessing nuclear weapons) | Synonyms: non-proliferation |
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| norethandrolone | (noun) a synthetic progestational hormone (trade name Norlutin) used in oral contraceptives and to treat endometriosis | Synonyms: norethindrone, norethindrone acetate, Norlutin |
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| numerological | (adjective) of or relating to numerology | - |
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| numerologist | (noun) a believer in numerology | - |
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| numerology | (noun) the study of the supposed occult influence of numbers on human affairs | - |
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| orology | (noun) the science of mountains | Synonyms: orography |
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| palaeodendrology | (noun) the branch of paleobotany that studies fossil trees | Synonyms: paleodendrology |
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| paleodendrology | (noun) the branch of paleobotany that studies fossil trees | Synonyms: palaeodendrology |
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| parole | (noun) (law) a conditional release from imprisonment that entitles the person to serve the remainder of the sentence outside the prison as long as the terms of release are complied with | - |
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| (noun) a promise | Synonyms: word, word of honor |
| (noun) a secret word or phrase known only to a restricted group | Synonyms: countersign, password, watchword, word |
| (verb) release a criminal from detention and place him on parole | - |
| parolee | (noun) someone released on probation or on parole | Synonyms: probationer |
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| patrol | (noun) the activity of going around or through an area at regular intervals for security purposes | - |
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| (noun) a detachment used for security or reconnaissance | - |
| (noun) a group that goes through a region at regular intervals for the purpose of security | - |
| (verb) maintain the security of by carrying out a patrol | Synonyms: police |
| patroller | (noun) someone on patrol duty; an individual or a member of a group that patrols an area | - |
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| patrolman | (noun) a policeman who patrols a given region | Synonyms: flatfoot |
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| patrology | (noun) the study of the lives, writings, and doctrines of the Church Fathers | Synonyms: patristics |
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| (noun) the writings of the early Church Fathers | Synonyms: patristics |
| payroll | (noun) the department that determines the amounts of wage or salary due to each employee | Synonyms: payroll department |
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| (noun) a list of employees and their salaries | Synonyms: paysheet |
| (noun) the total amount of money paid in wages | Synonyms: paysheet |
| petrol | (noun) a volatile flammable mixture of hydrocarbons (hexane and heptane and octane etc.) derived from petroleum; used mainly as a fuel in internal-combustion engines | Synonyms: gas, gasolene, gasoline |
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| petrolatum | (noun) a semisolid mixture of hydrocarbons obtained from petroleum; used in medicinal ointments and for lubrication | Synonyms: mineral jelly, petroleum jelly |
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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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| petrology | (noun) the branch of geology that studies rocks: their origin and formation and mineral composition and classification | Synonyms: lithology |
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| polyelectrolyte | (noun) an electrolyte of high molecular weight | - |
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| profiterole | (noun) a small hollow pastry that is typically filled with cream and covered with chocolate | - |
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| prolactin | (noun) gonadotropic hormone secreted by the anterior pituitary; in females it stimulates growth of the mammary glands and lactation after parturition | Synonyms: lactogenic hormone, luteotropin |
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| prolamine | (noun) a simple protein found in plants | - |
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| prolapse | (noun) the slipping or falling out of place of an organ (as the uterus) | Synonyms: descensus, prolapsus |
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| (verb) slip or fall out of place, as of body parts | - |
| prolapsus | (noun) the slipping or falling out of place of an organ (as the uterus) | Synonyms: descensus, prolapse |
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| prolate | (adjective) having the polar diameter greater than the equatorial diameter | Synonyms: watermelon-shaped |
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| (adjective) rounded like an egg | Synonyms: egg-shaped, elliptic, elliptical, oval-shaped, oval, ovate, oviform, ovoid |
| prole | (noun) a member of the working class (not necessarily employed) | Synonyms: proletarian, worker |
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| prolegomenon | (noun) a preliminary discussion inserted at the beginning of a book or treatise | - |
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| prolepsis | (noun) anticipating and answering objections in advance | - |
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| proletarian | (adjective) belonging to or characteristic of the proletariat | - |
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| (noun) a member of the working class (not necessarily employed) | Synonyms: prole, worker |
| proletarianism | (noun) The condition or political position of a member of the working class. | - |
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| proletariat | (noun) a social class comprising those who do manual labor or work for wages | Synonyms: labor, labour, working class |
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| proliferate | (verb) grow rapidly | - |
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| (verb) cause to grow or increase rapidly | - |
| proliferation | (noun) growth by the rapid multiplication of parts | - |
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| (noun) a rapid increase in number (especially a rapid increase in the number of deadly weapons) | - |
| prolific | (adjective) bearing in abundance especially offspring | Synonyms: fertile |
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| (adjective) intellectually productive | Synonyms: fecund, fertile |
| prolificacy | (noun) the property of producing abundantly and sustaining vigorous and luxuriant growth | Synonyms: fertility, rankness, richness |
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| proline | (noun) an amino acid that is found in many proteins (especially collagen) | - |
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| prolix | (adjective) tediously prolonged or tending to speak or write at great length | Synonyms: verbal |
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| prolixity | (noun) boring verbosity | Synonyms: long-windedness, prolixness, windiness, wordiness |
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| prolixness | (noun) boring verbosity | Synonyms: long-windedness, prolixity, windiness, wordiness |
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| prologise | (verb) write or speak a prologue | Synonyms: prologize, prologuize |
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| prologize | (verb) write or speak a prologue | Synonyms: prologise, prologuize |
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| prologue | (noun) an introduction to a play | - |
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| prologuize | (verb) write or speak a prologue | Synonyms: prologise, prologize |
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| prolong | (verb) lengthen in time; cause to be or last longer | Synonyms: draw out, extend, protract |
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| (verb) lengthen or extend in duration or space | Synonyms: keep up, sustain |
| prolongation | (noun) the act of prolonging something | Synonyms: lengthening, perpetuation, protraction |
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| (noun) amount or degree or range to which something extends | Synonyms: extension, lengthiness |
| (noun) the consequence of being lengthened in duration | Synonyms: continuation, lengthiness, protraction |
| prolonge | (noun) a rope fitted with a hook and used for towing a gun carriage | - |
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| prolonged | (adjective) drawn out or made longer spatially | Synonyms: elongated, extended, lengthened |
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| (adjective) relatively long in duration; tediously protracted | Synonyms: drawn-out, extended, lengthy, protracted |
| prolusion | (noun) exercising in preparation for strenuous activity | Synonyms: tune-up, warm-up |
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| (noun) a short introductory essay preceding the text of a book | Synonyms: foreword, preface |
| prolusory | (adjective) of or relating to or having the character of a prolusion | - |
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| pyrola | (noun) any of several evergreen perennials of the genus Pyrola | Synonyms: wintergreen |
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| pyrolatry | (noun) the worship of fire | Synonyms: fire-worship |
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| pyroligneous | (adjective) of a substance produced by the effect of heat on wood, especially by destructive distillation | Synonyms: pyrolignic |
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| pyrolignic | (adjective) of a substance produced by the effect of heat on wood, especially by destructive distillation | Synonyms: pyroligneous |
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| pyrolusite | (noun) a mineral consisting of manganese dioxide; an important source of manganese | - |
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| pyrolysis | (noun) transformation of a substance produced by the action of heat | - |
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