| adynamia | (noun) lack of strength or vigor (especially from illness) | - |
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| aerodynamics | (noun) the branch of mechanics that deals with the motion of gases (especially air) and their effects on bodies in the flow | Synonyms: aeromechanics |
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| anodyne | (noun) a medicine used to relieve pain | Synonyms: analgesic, pain pill, painkiller |
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| astrodynamics | (noun) the branch of astronomy that studies the motion of natural and artificial bodies in space | - |
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| biodynamics | (noun) the branch of biology dealing with energy or the activity of living organisms. | - |
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| dynamic | (noun) an efficient incentive | Synonyms: moral force |
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| dynamics | (noun) the branch of mechanics concerned with the forces that cause motions of bodies | Synonyms: kinetics |
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| dynamism | (noun) the activeness of an energetic personality | Synonyms: oomph, pizzaz, pizzazz, zing |
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| (noun) active strength of body or mind | Synonyms: heartiness, vigor, vigour |
| (noun) any of the various theories or doctrines or philosophical systems that attempt to explain the phenomena of the universe in terms of some immanent force or energy | - |
| dynamite | (noun) an explosive containing nitrate sensitized with nitroglycerin absorbed on wood pulp | - |
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| dynamiter | (noun) a person who uses dynamite in a revolutionary cause | Synonyms: dynamitist |
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| dynamitist | (noun) a person who uses dynamite in a revolutionary cause | Synonyms: dynamiter |
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| dynamo | (noun) generator consisting of a coil (the armature) that rotates between the poles of an electromagnet (the field magnet) causing a current to flow in the armature | - |
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| dynamometer | (noun) measuring instrument designed to measure power | Synonyms: ergometer |
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| dynast | (noun) a hereditary ruler | - |
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| dynasty | (noun) a sequence of powerful leaders in the same family | - |
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| dyne | (noun) a unit of force equal to the force that imparts an acceleration of 1 cm/sec/sec to a mass of 1 gram | - |
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| electrodynamometer | (noun) measuring instrument that uses the interaction of the magnetic fields of two coils to measure current or voltage or power | - |
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| glossodynia | (noun) pain in the tongue | Synonyms: glossalgia |
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| hemodynamics | (noun) the branch of physiology that studies the circulation of the blood and the forces involved | - |
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| hydrodynamics | (noun) study of fluids in motion | Synonyms: hydrokinetics |
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| magnetohydrodynamics | (noun) the study of the interaction of magnetic fields and electrically conducting fluids (as plasma or molten metal) | - |
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| myodynia | (noun) pain in a muscle or group of muscles | Synonyms: myalgia |
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| odynophagia | (noun) severe pain on swallowing due to a disorder of the esophagus | - |
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| pleurodynia | (noun) pain in the chest caused by inflammation of the muscles between the ribs | Synonyms: costalgia, pleuralgia |
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| psychodynamics | (noun) the branch of social psychology that deals with the processes and emotions that determine psychology and motivation | - |
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| (noun) the interrelation of conscious and unconscious processes and emotions that determine personality and motivation | - |
| thermodynamics | (noun) the branch of physics concerned with the conversion of different forms of energy | - |
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| urodynia | (noun) pain during urination | - |
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