| experimentation | (noun) the act of conducting a controlled test or investigation | Synonyms: experiment |
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| (noun) the testing of an idea | Synonyms: experiment |
| experimenter | (noun) a research worker who conducts experiments | - |
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| (noun) a person who enjoys testing innovative ideas | - |
| expert | (noun) a person with special knowledge or ability who performs skillfully | - |
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| expertise | (noun) skillfulness by virtue of possessing special knowledge | Synonyms: expertness |
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| expertness | (noun) skillfulness by virtue of possessing special knowledge | Synonyms: expertise |
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| flapper | (noun) a young woman in the 1920s who flaunted her unconventional conduct and dress | - |
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| flipper | (noun) the flat broad limb of aquatic animals specialized for swimming | - |
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| (noun) a shoe for swimming; the paddle-like front is an aid in swimming (especially underwater) | Synonyms: fin |
| flypaper | (noun) paper that is poisoned or coated with a sticky substance to kill flies | - |
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| foreperson | (noun) the presiding member of the jury and the one who speaks on their behalf | - |
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| freedperson | (noun) a person who has been freed from slavery | - |
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| freeperson | (noun) a person who is not a serf or a slave | - |
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| frippery | (noun) something of little value or significance | Synonyms: bagatelle, fluff, frivolity |
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| froghopper | (noun) a variety of spittlebug | - |
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| gamekeeper | (noun) a person employed to take care of game and wildlife | Synonyms: game warden |
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| gatekeeper | (noun) someone who guards an entrance | Synonyms: door guard, doorkeeper, doorman, hall porter, ostiary, porter |
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| (noun) someone who controls access to something | - |
| goalkeeper | (noun) the defensive position on an ice hockey or soccer or lacrosse team who stands in front of the goal and tries to prevent opposing players from scoring | Synonyms: goalie, goaltender, netkeeper |
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| (noun) the soccer or hockey player assigned to protect the goal | Synonyms: goalie, goaltender, netkeeper, netminder |
| gossiper | (noun) a person given to gossiping and divulging personal information about others | Synonyms: gossip, gossipmonger, newsmonger, rumormonger, rumourmonger |
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| grasshopper | (noun) terrestrial plant-eating insect with hind legs adapted for leaping | Synonyms: hopper |
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| (noun) a cocktail made of creme de menthe and cream (sometimes with creme de cacao) | - |
| greenskeeper | (noun) someone responsible for the maintenance of a golf course | - |
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| groundkeeper | (noun) someone who maintains the grounds (of an estate or park or athletic field) | Synonyms: groundskeeper, groundsman |
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| groundskeeper | (noun) someone who maintains the grounds (of an estate or park or athletic field) | Synonyms: groundkeeper, groundsman |
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| grouper | (noun) usually solitary bottom sea basses of warm seas | - |
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| (noun) flesh of a saltwater fish similar to sea bass | - |
| gulper | (noun) a drinker who swallows large amounts greedily | Synonyms: guzzler |
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| gymnosperm | (noun) plants of the class Gymnospermae having seeds not enclosed in an ovary | - |
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| haloperidol | (noun) tranquilizer (trade name Haldol) used to treat some psychotic disorders and Tourette's syndrome | Synonyms: Haldol |
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| hamper | (noun) a basket usually with a cover | - |
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| (noun) a restraint that confines or restricts freedom (especially something used to tie down or restrain a prisoner) | Synonyms: bond, shackle, trammel |
| handicapper | (noun) someone who sets the betting odds based on calculations of the outcome of a contest (especially a horse race) | Synonyms: odds-maker |
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| harper | (noun) someone who plays the harp | Synonyms: harpist |
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| helper | (noun) a person who helps people or institutions (especially with financial help) | Synonyms: benefactor |
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| (noun) a person who contributes to the fulfillment of a need or furtherance of an effort or purpose | Synonyms: assistant, help, supporter |
| honeycreeper | (noun) small bright-colored tropical American songbird with a curved bill for sucking nectar | - |
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| (noun) small to medium-sized finches of the Hawaiian islands | Synonyms: Hawaiian honeycreeper |
| hoper | (noun) a person who hopes | - |
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| hopper | (noun) (baseball) a hit that travels along the ground | Synonyms: ground ball, groundball, grounder |
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| (noun) terrestrial plant-eating insect with hind legs adapted for leaping | Synonyms: grasshopper |
| (noun) funnel-shaped receptacle; contents pass by gravity into a receptacle below | - |
| (noun) a machine used for picking hops | Synonyms: hop-picker |
| (noun) someone who hops | - |
| hotelkeeper | (noun) an owner or manager of hotels | Synonyms: hosteller, hotel manager, hotelier, hotelman |
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| housekeeper | (noun) a servant who is employed to perform domestic task in a household | - |
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| hyperacidity | (noun) excessive acidity | - |
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| hyperactivity | (noun) a condition characterized by excessive restlessness and movement | - |
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| hyperacusia | (noun) abnormal acuteness of hearing due to increased irritability of the sensory neural mechanism; characterized by intolerance for ordinary sound levels | Synonyms: auditory hyperesthesia, hyperacusis |
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| hyperacusis | (noun) abnormal acuteness of hearing due to increased irritability of the sensory neural mechanism; characterized by intolerance for ordinary sound levels | Synonyms: auditory hyperesthesia, hyperacusia |
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| hyperadrenalism | (noun) a glandular disorder caused by excessive ACTH resulting in greater than normal functioning of the adrenal gland; characterized by obesity | Synonyms: Cushing's disease |
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| hyperadrenocorticism | (noun) a glandular disorder caused by excessive cortisol | Synonyms: Cushing's syndrome |
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| hyperaemia | (noun) increased blood in an organ or other body part | Synonyms: hyperemia |
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| hyperaldosteronism | (noun) a condition caused by overproduction of aldosterone | Synonyms: aldosteronism |
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| hyperalimentation | (noun) administration of a nutritionally adequate solution through a catheter into the vena cava; used in cases of long-term coma or severe burns or severe gastrointestinal syndromes | Synonyms: total parenteral nutrition, TPN |
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| hyperbaton | (noun) reversal of normal word order (as in `cheese I love') | - |
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| hyperbetalipoproteinemia | (noun) a genetic disorder characterized by high levels of beta-lipoproteins and cholesterol; can lead to atherosclerosis at an early age | - |
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| hyperbilirubinemia | (noun) abnormally high amounts of bile pigment (bilirubin) in the blood | - |
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| hyperbola | (noun) an open curve formed by a plane that cuts the base of a right circular cone | - |
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| hyperbole | (noun) extravagant exaggeration | Synonyms: exaggeration |
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| hyperbolism | (noun) the use of hyperbole. | - |
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| hyperboloid | (noun) a quadric surface generated by rotating a hyperbola around its main axis | - |
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| hypercalcaemia | (noun) the presence of abnormally high levels of calcium in the blood; usually the result of excessive bone resorption in hyperparathyroidism or Paget's disease | Synonyms: hypercalcemia |
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| hypercalcemia | (noun) the presence of abnormally high levels of calcium in the blood; usually the result of excessive bone resorption in hyperparathyroidism or Paget's disease | Synonyms: hypercalcaemia |
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| hypercalcinuria | (noun) the presence of abnormally high levels of calcium in the urine; usually the result of excessive bone resorption in hyperparathyroidism or osteoporosis | Synonyms: hypercalciuria |
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| hypercalciuria | (noun) the presence of abnormally high levels of calcium in the urine; usually the result of excessive bone resorption in hyperparathyroidism or osteoporosis | Synonyms: hypercalcinuria |
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| hypercapnia | (noun) the physical condition of having the presence of an abnormally high level of carbon dioxide in the circulating blood | Synonyms: hypercarbia |
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| hypercarbia | (noun) the physical condition of having the presence of an abnormally high level of carbon dioxide in the circulating blood | Synonyms: hypercapnia |
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| hypercatalectic | (noun) (prosody) a line of poetry having an extra syllable or syllables at the end of the last metrical foot | - |
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| hypercellularity | (noun) the state of having abnormally many cells | - |
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| hypercholesteremia | (noun) the presence of an abnormal amount of cholesterol in the cells and plasma of the blood; associated with the risk of atherosclerosis | Synonyms: hypercholesterolemia |
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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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| hypercoaster | (noun) a roller coaster that goes up 200 feet or higher and can catapult riders from 0 to 70 mph in 4 seconds by motors originally designed to launch rockets | - |
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| hypercriticism | (noun) Excessive or unfairly harsh criticism. | - |
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| hyperdactyly | (noun) birth defect characterized by the presence of more than the normal number of fingers or toes | Synonyms: polydactyly |
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| hyperemesis | (noun) severe and excessive vomiting | - |
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| hyperemia | (noun) increased blood in an organ or other body part | Synonyms: hyperaemia |
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| hyperextension | (noun) greater than normal extension | - |
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| hyperglycaemia | (noun) abnormally high blood sugar usually associated with diabetes | Synonyms: hyperglycemia |
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| hyperglycemia | (noun) abnormally high blood sugar usually associated with diabetes | Synonyms: hyperglycaemia |
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| hyperhidrosis | (noun) excessive and profuse perspiration | Synonyms: hyperidrosis, polyhidrosis |
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| hypericism | (noun) a severe dermatitis of herbivorous domestic animals attributable to photosensitivity from eating Saint John's wort | - |
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| hyperidrosis | (noun) excessive and profuse perspiration | Synonyms: hyperhidrosis, polyhidrosis |
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| hyperintelligence | (noun) Remarkable intelligence, intelligence at or above and beyond the level of a genius. | Synonyms: superintelligence |
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| hyperkalemia | (noun) higher than normal levels of potassium in the circulating blood; associated with kidney failure or sometimes with the use of diuretic drugs | - |
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| hyperlink | (noun) a link from a hypertext file to another location or file; typically activated by clicking on a highlighted word or icon at a particular location on the screen | - |
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| hyperlipaemia | (noun) presence of excess lipids in the blood | Synonyms: hyperlipemia, hyperlipidaemia, hyperlipidemia, hyperlipoidaemia, hyperlipoidemia, lipaemia, lipemia, lipidaemia, lipidemia, lipoidaemia, lipoidemia |
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| hyperlipemia | (noun) presence of excess lipids in the blood | Synonyms: hyperlipaemia, hyperlipidaemia, hyperlipidemia, hyperlipoidaemia, hyperlipoidemia, lipaemia, lipemia, lipidaemia, lipidemia, lipoidaemia, lipoidemia |
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| hyperlipidaemia | (noun) presence of excess lipids in the blood | Synonyms: hyperlipaemia, hyperlipemia, hyperlipidemia, hyperlipoidaemia, hyperlipoidemia, lipaemia, lipemia, lipidaemia, lipidemia, lipoidaemia, lipoidemia |
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| hyperlipidemia | (noun) presence of excess lipids in the blood | Synonyms: hyperlipaemia, hyperlipemia, hyperlipidaemia, hyperlipoidaemia, hyperlipoidemia, lipaemia, lipemia, lipidaemia, lipidemia, lipoidaemia, lipoidemia |
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| hyperlipoidaemia | (noun) presence of excess lipids in the blood | Synonyms: hyperlipaemia, hyperlipemia, hyperlipidaemia, hyperlipidemia, hyperlipoidemia, lipaemia, lipemia, lipidaemia, lipidemia, lipoidaemia, lipoidemia |
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| hyperlipoidemia | (noun) presence of excess lipids in the blood | Synonyms: hyperlipaemia, hyperlipemia, hyperlipidaemia, hyperlipidemia, hyperlipoidaemia, lipaemia, lipemia, lipidaemia, lipidemia, lipoidaemia, lipoidemia |
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| hyperlipoproteinemia | (noun) any of various disorders of lipoprotein and cholesterol metabolism that result in high levels of lipoprotein and cholesterol in the circulating blood | - |
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| hypermarket | (noun) a huge supermarket (usually built on the outskirts of a town) | - |
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| hypermastigote | (noun) flagellate symbiotic in the intestines of e.g. termites | - |
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| hypermedia | (noun) a multimedia system in which related items of information are connected and can be presented together | Synonyms: hypermedia system, interactive multimedia, interactive multimedia system |
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| hypermenorrhea | (noun) abnormally heavy or prolonged menstruation; can be a symptom of uterine tumors and can lead to anemia if prolonged | Synonyms: menorrhagia |
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| hypermetropia | (noun) abnormal condition in which vision for distant objects is better than for near objects | Synonyms: farsightedness, hypermetropy, hyperopia, longsightedness |
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| hypermetropy | (noun) abnormal condition in which vision for distant objects is better than for near objects | Synonyms: farsightedness, hypermetropia, hyperopia, longsightedness |
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| hypermotility | (noun) excessive movement; especially excessive motility of the gastrointestinal tract | - |
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| hypernatremia | (noun) excessive amounts of sodium in the blood; possibly indicating diabetes insipidus | - |
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| hypernym | (noun) a word that is more generic than a given word | Synonyms: superordinate, superordinate word |
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| hypernymy | (noun) the semantic relation of being superordinate or belonging to a higher rank or class | Synonyms: superordination |
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| hyperon | (noun) any baryon that is not a nucleon; unstable particle with mass greater than a neutron | - |
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| hyperope | (noun) a person with hyperopia; a farsighted person | - |
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| hyperopia | (noun) abnormal condition in which vision for distant objects is better than for near objects | Synonyms: farsightedness, hypermetropia, hypermetropy, longsightedness |
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| hyperparathyroidism | (noun) excessive secretion of parathyroid hormone resulting in abnormally high levels of calcium in the blood; can affect many systems of the body (especially causing bone resorption and osteoporosis) | - |
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| hyperpiesia | (noun) persistent and pathological high blood pressure for which no specific cause can be found | Synonyms: essential hypertension, hyperpiesis |
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| hyperpiesis | (noun) persistent and pathological high blood pressure for which no specific cause can be found | Synonyms: essential hypertension, hyperpiesia |
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| hyperpigmentation | (noun) unusual darkening of the skin | - |
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| hyperpituitarism | (noun) excessive activity of the pituitary gland (especially overactivity of the anterior lobe which leads to excess secretion of growth hormone) | - |
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| hyperplasia | (noun) abnormal increase in number of cells | - |
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