| ambler | (noun) someone who walks at a leisurely pace | Synonyms: saunterer, stroller |
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| amblygonite | (noun) a white or grey mineral consisting of lithium aluminum phosphate; a source of lithium | - |
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| amblyopia | (noun) visual impairment without apparent organic pathology | - |
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| ambulacrum | (noun) one of the five areas on the undersurface of an echinoderm on which the tube feet are located | - |
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| ambulance | (noun) a vehicle that takes people to and from hospitals | - |
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| ambulation | (noun) walking about | - |
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| ambulatory | (noun) a covered walkway (as in a cloister) | - |
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| amelia | (noun) congenital absence of an arm or leg | - |
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| amelioration | (noun) the act of relieving ills and changing for the better | Synonyms: betterment, melioration |
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| ameloblast | (noun) a cell from which tooth enamel develops | - |
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| amelogenesis | (noun) the developmental process of forming tooth enamel | - |
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| amenability | (noun) the trait of being cooperative | Synonyms: amenableness, cooperativeness |
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| amenableness | (noun) the trait of being cooperative | Synonyms: amenability, cooperativeness |
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| amiability | (noun) a disposition to be friendly and approachable (easy to talk to) | Synonyms: affability, affableness, amiableness, bonhomie, geniality |
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| (noun) a cheerful and agreeable mood | Synonyms: good humor, good humour, good temper |
| amiableness | (noun) a disposition to be friendly and approachable (easy to talk to) | Synonyms: affability, affableness, amiability, bonhomie, geniality |
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| amicability | (noun) having a disposition characterized by warmth and friendliness | Synonyms: amicableness |
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| (noun) a disinclination to quarrel | Synonyms: amicableness |
| amicableness | (noun) having a disposition characterized by warmth and friendliness | Synonyms: amicability |
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| (noun) a disinclination to quarrel | Synonyms: amicability |
| aminoalkane | (noun) a compound derived from ammonia by replacing hydrogen atoms by univalent hydrocarbon radicals | Synonyms: amine |
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| aminophylline | (noun) a theophylline derivative that is used as a bronchodilator in the treatment of bronchial asthma, emphysema, and bronchitis | - |
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| aminoplast | (noun) a plastic (synthetic resin) made from amino compounds; used as an adhesive and as a coating for paper and textiles | Synonyms: amino plastic, amino resin |
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| amitriptyline | (noun) a tricyclic antidepressant drug (trade name Elavil) with serious side effects; interacts with many other medications | Synonyms: amitriptyline hydrochloride, Elavil |
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| ammonal | (noun) Ammonal is an explosive made up of ammonium nitrate and aluminum powder. | - |
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| amobarbital | (noun) a barbiturate with sedative and hypnotic effects; used to relieve insomnia and as an anticonvulsant | - |
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| amoralism | (noun) the doctrine that moral distinctions are invalid | - |
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| amoralist | (noun) someone who adheres to the doctrine that ordinary moral distinctions are invalid | - |
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| amorality | (noun) the quality of being amoral | - |
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| amorphophallus | (noun) any plant of the genus Amorphophallus | - |
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| amoxicillin | (noun) an antibiotic; a semisynthetic oral penicillin (trade names Amoxil and Larotid and Polymox and Trimox and Augmentin) used to treat bacterial infections | Synonyms: Amoxil, Augmentin, Larotid, Polymox, Trimox |
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| amphibole | (noun) a mineral or mineral variety belonging to the amphibole group | - |
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| amphibolite | (noun) a metamorphic rock composed chiefly of amphibole and plagioclase | - |
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| amphibology | (noun) an ambiguous grammatical construction; e.g., `they are flying planes' can mean either that someone is flying planes or that something is flying planes | Synonyms: amphiboly |
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| amphiboly | (noun) an ambiguous grammatical construction; e.g., `they are flying planes' can mean either that someone is flying planes or that something is flying planes | Synonyms: amphibology |
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| amphidiploid | (noun) (genetics) an organism or cell having a diploid set of chromosomes from each parent | - |
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| amphidiploidy | (noun) the condition of being amphidiploid | - |
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| ampholyte | (noun) A substance that acts as a base or an acid, depending on the pH of the solution into which it is introduced. | Synonyms: amphoteric electrolyte |
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| ampicillin | (noun) semisynthetic penicillin (trade names Principen and Polycillin and SK-Ampicillin) | Synonyms: Polycillin, Principen, SK-Ampicillin |
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| ampleness | (noun) the property of impressive largeness in size | - |
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| (noun) the property of being more than sufficient; comfortable sufficiency | - |
| amplification | (noun) (electronics) the act of increasing voltage or power or current | - |
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| (noun) addition of extra material or illustration or clarifying detail | Synonyms: elaboration |
| (noun) the amount of increase in signal power or voltage or current expressed as the ratio of output to input | Synonyms: gain |
| amplifier | (noun) electronic equipment that increases strength of signals passing through it | - |
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| amplitude | (noun) greatness of magnitude | - |
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| (noun) the property of copious abundance | Synonyms: bountifulness, bounty |
| (noun) (physics) the maximum displacement of a periodic wave | - |
| ampoule | (noun) a small bottle that contains a drug (especially a sealed sterile container for injection by needle) | Synonyms: ampul, ampule, phial, vial |
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| ampul | (noun) a small bottle that contains a drug (especially a sealed sterile container for injection by needle) | Synonyms: ampoule, ampule, phial, vial |
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| ampule | (noun) a small bottle that contains a drug (especially a sealed sterile container for injection by needle) | Synonyms: ampoule, ampul, phial, vial |
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| ampulla | (noun) a flask that has two handles; used by Romans for wines or oils | - |
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| (noun) the dilated portion of a canal or duct especially of the semicircular canals of the ear | - |
| amulet | (noun) a trinket or piece of jewelry usually hung about the neck and thought to be a magical protection against evil or disease | Synonyms: talisman |
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| amygdala | (noun) an almond-shaped neural structure in the anterior part of the temporal lobe of the cerebrum; intimately connected with the hypothalamus and the hippocampus and the cingulate gyrus; as part of the limbic system it plays an important role in motivation and emotional behavior | Synonyms: amygdaloid nucleus, corpus amygdaloideum |
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| amygdalin | (noun) a bitter cyanogenic glucoside extracted from the seeds of apricots and plums and bitter almonds | - |
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| amygdaloid | (noun) volcanic rock in which rounded cavities formed by expanding gas have subsequently become filled with mineral deposits | - |
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| amygdalotomy | (noun) psychosurgery in which amygdaloid fibers that mediate limbic system activity are severed (in cases of extreme uncontrollable violence) | - |
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| amyl | (noun) a hydrocarbon radical that occurs in many organic compounds | - |
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| amylase | (noun) any of a group of proteins found in saliva and pancreatic juice and parts of plants; help convert starch to sugar | - |
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| amyloid | (noun) (pathology) a waxy translucent complex protein resembling starch that results from degeneration of tissue | - |
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| (noun) a non-nitrogenous food substance consisting chiefly of starch; any substance resembling starch | - |
| amyloidosis | (noun) a disorder characterized by deposit of amyloid in organs or tissues; often secondary to chronic rheumatoid arthritis or tuberculosis or multiple myeloma | - |
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| amylolysis | (noun) conversion of starch to sugar | - |
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| amylum | (noun) a complex carbohydrate found chiefly in seeds, fruits, tubers, roots and stem pith of plants, notably in corn, potatoes, wheat, and rice; an important foodstuff and used otherwise especially in adhesives and as fillers and stiffeners for paper and textiles | Synonyms: starch |
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| anabolism | (noun) the synthesis in living organisms of more complex substances (e.g., living tissue) from simpler ones together with the storage of energy | Synonyms: constructive metabolism |
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| anaclisis | (noun) (psychoanalysis) relationship marked by strong dependence on others; especially a libidinal attachment to e.g. a parental figure | - |
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| anacoluthia | (noun) an abrupt change within a sentence from one syntactic structure to another | Synonyms: anacoluthon |
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| anacoluthon | (noun) an abrupt change within a sentence from one syntactic structure to another | Synonyms: anacoluthia |
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| anadiplosis | (noun) repetition of the final words of a sentence or line at the beginning of the next | Synonyms: reduplication |
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| anaglyph | (noun) anything carved in low relief | - |
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| (noun) moving or still pictures in contrasting colors that appear three-dimensional when superimposed | - |
| anaglyphy | (noun) the process of producing pictures in contrasting colors that appear three-dimensional when superimposed and viewed through spectacles with one red and one green lens | - |
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| analbuminemia | (noun) an abnormally low level of albumin in the blood serum | - |
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| analecta | (noun) a collection of excerpts from a literary work | Synonyms: analects |
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| analects | (noun) a collection of excerpts from a literary work | Synonyms: analecta |
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| analeptic | (noun) a medication used as a stimulant to the central nervous system | - |
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| analgesia | (noun) absence of the sense of pain without loss of consciousness | - |
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| analgesic | (noun) a medicine used to relieve pain | Synonyms: anodyne, pain pill, painkiller |
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| analog | (noun) something having the property of being analogous to something else | Synonyms: analogue, parallel |
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| analogist | (noun) someone who looks for analogies or who reasons by analogy | - |
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| analogue | (noun) something having the property of being analogous to something else | Synonyms: analog, parallel |
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| analogy | (noun) drawing a comparison in order to show a similarity in some respect | - |
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| (noun) an inference that if things agree in some respects they probably agree in others | - |
| (noun) the religious belief that between creature and creator no similarity can be found so great but that the dissimilarity is always greater; any analogy between God and humans will always be inadequate | Synonyms: doctrine of analogy |
| analphabet | (noun) an illiterate person who does not know the alphabet | Synonyms: analphabetic |
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| analphabetic | (noun) an illiterate person who does not know the alphabet | Synonyms: analphabet |
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| analphabetism | (noun) an inability to read | Synonyms: illiteracy |
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| analysand | (noun) a person undergoing psychoanalysis | - |
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| analyser | (noun) an instrument that performs analyses | Synonyms: analyzer |
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| analysis | (noun) an investigation of the component parts of a whole and their relations in making up the whole | - |
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| (noun) a set of techniques for exploring underlying motives and a method of treating various mental disorders; based on the theories of Sigmund Freud | Synonyms: depth psychology, psychoanalysis |
| (noun) the abstract separation of a whole into its constituent parts in order to study the parts and their relations | Synonyms: analytic thinking |
| (noun) a branch of mathematics involving calculus and the theory of limits; sequences and series and integration and differentiation | - |
| (noun) a form of literary criticism in which the structure of a piece of writing is analyzed | - |
| (noun) the use of closed-class words instead of inflections: e.g., `the father of the bride' instead of `the bride's father' | - |
| analyst | (noun) someone who is skilled at analyzing data | - |
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| (noun) a licensed practitioner of psychoanalysis | Synonyms: psychoanalyst |
| (noun) an expert who studies financial data (on credit or securities or sales or financial patterns etc.) and recommends appropriate business actions | - |
| analyticity | (noun) the property of being analytic | - |
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| analyzer | (noun) an instrument that performs analyses | Synonyms: analyser |
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| anaphylaxis | (noun) hypersensitivity reaction to the ingestion or injection of a substance (a protein or drug) resulting from prior contact with a substance | - |
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| anaplasia | (noun) loss of structural differentiation within a cell or group of cells often with increased capacity for multiplication, as in a malignant tumor | - |
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| anaplasmosis | (noun) a disease of cattle that is transmitted by cattle ticks; similar to Texas fever | - |
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| anaplasty | (noun) surgery concerned with therapeutic or cosmetic reformation of tissue | Synonyms: plastic surgery, reconstructive surgery |
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| anastalsis | (noun) muscular action of the alimentary tract in a direction opposite to peristalsis | - |
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| anastylosis | (noun) the archeological reassembly of ruined monuments from fallen or decayed fragments (incorporating new materials when necessary) | - |
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| anatomical | (noun) an expression that relates to anatomy | Synonyms: anatomical reference |
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| anchylosis | (noun) abnormal adhesion and rigidity of the bones of a joint | Synonyms: ankylosis |
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| andelmin | (noun) any of several tropical American trees of the genus Andira | Synonyms: angelim |
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| androglossia | (noun) a woman's voice with male qualities | - |
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| andryala | (noun) any plant of the genus Andryala having milky sap and heads of bright yellow flowers | - |
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| anecdotalism | (noun) The property of being related to short accounts of real incidents or persons, often humorous or interesting. | - |
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| anemoclinometer | (noun) A type of instrument which measures the inclination of the wind to the horizontal plane. | - |
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| anencephalia | (noun) a defect in brain development resulting in small or missing brain hemispheres | Synonyms: anencephaly |
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| anencephaly | (noun) a defect in brain development resulting in small or missing brain hemispheres | Synonyms: anencephalia |
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| anesthesiologist | (noun) a specialist who administers an anesthetic to a patient before he is treated | Synonyms: anaesthetist, anesthetist |
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| anesthesiology | (noun) the branch of medical science that studies and applies anesthetics | - |
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| anesthyl | (noun) a mixture of methyl and ethyl chloride; sprayed on as a local anesthetic | - |
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| anethole | (noun) an organic compound that is widely used as a flavoring substance. | Synonyms: anise camphor |
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