| accelerometer | (noun) an instrument for measuring the acceleration of aircraft or rockets | - |
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| acromegalia | (noun) enlargement of bones of hands and feet and face; often accompanied by headache and muscle pain and emotional disturbances; caused by overproduction of growth hormone by the anterior pituitary gland (due to a tumor) | Synonyms: acromegaly |
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| acromegaly | (noun) enlargement of bones of hands and feet and face; often accompanied by headache and muscle pain and emotional disturbances; caused by overproduction of growth hormone by the anterior pituitary gland (due to a tumor) | Synonyms: acromegalia |
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| aerodrome | (noun) an airfield equipped with control tower and hangars as well as accommodations for passengers and cargo | Synonyms: airdrome, airport, drome |
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| aeromechanics | (noun) the branch of mechanics that deals with the motion of gases (especially air) and their effects on bodies in the flow | Synonyms: aerodynamics |
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| aeromedicine | (noun) the study and treatment of disorders associated with flight (especially with space flight) | Synonyms: aerospace medicine, aviation medicine |
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| airdrome | (noun) an airfield equipped with control tower and hangars as well as accommodations for passengers and cargo | Synonyms: aerodrome, airport, drome |
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| andromeda | (noun) any of several shrubs of the genus Andromeda having leathery leaves and clusters of small flowers | - |
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| (noun) broad-leaved evergreen Asiatic shrub with glossy leaves and drooping clusters of white flowers | Synonyms: Japanese andromeda, lily-of-the-valley tree, Pieris japonica |
| arthromere | (noun) any of the segments in the body of a jointed animal like an arthropod | - |
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| astrometry | (noun) the branch of astronomy that deals with the measurement of the position and motion of celestial bodies | - |
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| barometer | (noun) an instrument that measures atmospheric pressure | - |
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| brome | (noun) any of various woodland and meadow grasses of the genus Bromus; native to temperate regions | Synonyms: bromegrass |
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| bromegrass | (noun) any of various woodland and meadow grasses of the genus Bromus; native to temperate regions | Synonyms: brome |
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| bromeosin | (noun) a red fluorescent dye resulting from the action of bromine on fluorescein; used in cosmetics and as a biological stain for studying cell structures | Synonyms: eosin |
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| centromere | (noun) a specialized condensed region of each chromosome that appears during mitosis where the chromatids are held together to form an X shape | Synonyms: kinetochore |
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| cerebromeningitis | (noun) inflammation of the brain and spinal cord and their meninges | Synonyms: encephalomeningitis, meningoencephalitis |
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| chrome | (noun) another word for chromium when it is used in dyes or pigments | - |
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| chromesthesia | (noun) a form of synesthesia in which nonvisual stimulation results in the experience of color sensations | Synonyms: chromaesthesia |
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| cytochrome | (noun) (biochemistry) a class of hemoprotein whose principal biological function is electron transfer (especially in cellular respiration) | - |
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| diapheromera | (noun) a variety of stick insect | Synonyms: Diapheromera femorata |
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| dichloromethane | (noun) a nonflammable liquid used as a solvent and paint remover and refrigerant | Synonyms: methylene chloride |
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| drome | (noun) an airfield equipped with control tower and hangars as well as accommodations for passengers and cargo | Synonyms: aerodrome, airdrome, airport |
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| dromedary | (noun) one-humped camel of the hot deserts of northern Africa and southwestern Asia | Synonyms: Arabian camel, Camelus dromedarius |
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| durometer | (noun) An instrument for measuring the degree of hardness; especially, an instrument for testing the relative hardness of steel rails and the like. | - |
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| electrometer | (noun) meter to measure electrostatic voltage differences; draws no current from the source | - |
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| evaporometer | (noun) an instrument that measures rate of evaporation of water | Synonyms: atmometer |
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| fluorochrome | (noun) any of various fluorescent substances used in fluorescence microscopy to stain specimens | - |
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| hematochrome | (noun) a reddish coloring material found in some algae | - |
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| heterometabolism | (noun) development of insects with incomplete metamorphosis in which no pupal stage precedes maturity | Synonyms: heterometaboly |
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| heterometaboly | (noun) development of insects with incomplete metamorphosis in which no pupal stage precedes maturity | Synonyms: heterometabolism |
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| hippodrome | (noun) a stadium for horse shows or horse races | - |
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| hydromel | (noun) honey diluted in water; becomes mead when fermented | - |
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| hydrometer | (noun) a measuring instrument for determining the specific gravity of a liquid or solid | Synonyms: gravimeter |
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| hydrometry | (noun) the measurement of specific gravity | Synonyms: gravimetry |
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| hygrometer | (noun) measuring instrument for measuring the relative humidity of the atmosphere | - |
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| interferometer | (noun) any measuring instrument that uses interference patterns to make accurate measurements of waves | - |
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| katharometer | (noun) measures thermal conductivity | - |
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| loxodrome | (noun) a line on a sphere that cuts all meridians at the same angle; the path taken by a ship or plane that maintains a constant compass direction | Synonyms: rhumb, rhumb line |
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| meromelia | (noun) congenital absence of part of an arm or leg | - |
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| micrometeor | (noun) a meteorite or meteoroid so small that it drifts down to earth without becoming intensely heated in the atmosphere | Synonyms: micrometeorite, micrometeoroid |
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| micrometeorite | (noun) a meteorite or meteoroid so small that it drifts down to earth without becoming intensely heated in the atmosphere | Synonyms: micrometeor, micrometeoroid |
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| micrometeoroid | (noun) a meteorite or meteoroid so small that it drifts down to earth without becoming intensely heated in the atmosphere | Synonyms: micrometeor, micrometeorite |
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| micrometer | (noun) a metric unit of length equal to one millionth of a meter | Synonyms: micrometre, micron |
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| (noun) caliper for measuring small distances | Synonyms: micrometer caliper, micrometer gauge |
| micrometre | (noun) a metric unit of length equal to one millionth of a meter | Synonyms: micrometer, micron |
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| micrometry | (noun) measuring with a micrometer | - |
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| monochrome | (noun) a black-and-white photograph or slide | Synonyms: black and white |
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| (noun) painting done in a range of tones of a single color | - |
| nitrochloromethane | (noun) gaseous form of chloropicrin used as tear gas | - |
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| palindrome | (noun) a word or phrase that reads the same backward as forward | - |
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| perchloromethane | (noun) a colorless nonflammable liquid used as a solvent for fats and oils; because of its toxicity its use as a cleaning fluid or fire extinguisher has declined | Synonyms: carbon tet, carbon tetrachloride, tetrachloromethane |
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| polychrome | (noun) a piece of work composed of or decorated in many colors | - |
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| prodrome | (noun) an early symptom that a disease is developing or that an attack is about to occur | Synonyms: prodroma |
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| promenade | (noun) a leisurely walk (usually in some public place) | Synonyms: amble, perambulation, saunter, stroll |
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| (noun) a march of all the guests at the opening of a formal dance | - |
| (noun) a square dance figure; couples march counterclockwise in a circle | - |
| (noun) a public area set aside as a pedestrian walk | Synonyms: mall |
| (noun) a formal ball held for a school class toward the end of the academic year | Synonyms: prom |
| promethazine | (noun) antihistamine (trade name Phenergan) used to treat allergies; also an antiemetic used to treat motion sickness | Synonyms: Phenergan |
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| promethium | (noun) a soft silvery metallic element of the rare earth group having no stable isotope; was discovered in radioactive form as a fission product of uranium | Synonyms: atomic number 61, Pm |
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| psychrometer | (noun) a hygrometer consisting of a dry-bulb thermometer and a wet-bulb thermometer; their difference indicates the dryness of the surrounding air | - |
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| pyrometer | (noun) a thermometer designed to measure high temperatures | - |
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| radiomicrometer | (noun) radiometer that is extremely sensitive | - |
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| sclerometer | (noun) a measuring instrument that measures the hardness of materials by penetrating them with a stylus that has a diamond point | - |
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| spectrometer | (noun) spectroscope for obtaining a mass spectrum by deflecting ions into a thin slit and measuring the ion current with an electrometer | Synonyms: mass spectrometer |
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| spectrometry | (noun) the use of spectroscopes to analyze spectra | Synonyms: spectrographic analysis, spectroscopic analysis, spectroscopy, spectrum analysis |
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| spherometer | (noun) a measuring instrument for measuring the curvature of a surface | - |
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| spirometer | (noun) a measuring instrument for measuring the vital capacity of the lungs | - |
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| spirometry | (noun) the use of a spirometer to measure vital capacity | - |
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| synchromesh | (noun) an automotive system for shifting gears in which the gears revolve at the same speed and so shift smoothly | - |
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| syndrome | (noun) a complex of concurrent things | - |
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| (noun) a pattern of symptoms indicative of some disease | - |
| tetrachloromethane | (noun) a colorless nonflammable liquid used as a solvent for fats and oils; because of its toxicity its use as a cleaning fluid or fire extinguisher has declined | Synonyms: carbon tet, carbon tetrachloride, perchloromethane |
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| thermohydrometer | (noun) a hydrometer that includes a thermometer | Synonyms: thermogravimeter |
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| thyromegaly | (noun) abnormally enlarged thyroid gland; can result from underproduction or overproduction of hormone or from a deficiency of iodine in the diet | Synonyms: goiter, goitre, struma |
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| tichodrome | (noun) crimson-and-grey songbird that inhabits town walls and mountain cliffs of southern Eurasia and northern Africa | Synonyms: Tichodroma muriaria, wall creeper |
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| trichloromethane | (noun) a volatile liquid haloform (CHCl3); formerly used as an anesthetic | Synonyms: chloroform |
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| trifluoromethane | (noun) colorless gas haloform CHF3 (similar to chloroform) | Synonyms: fluoroform |
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| velodrome | (noun) a banked oval track for bicycle or motorcycle racing | - |
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