| asthenia | (noun) an abnormal loss of strength | Synonyms: astheny |
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| asthenopia | (noun) a tiredness of the eyes caused by prolonged close work by a person with an uncorrected vision problem | Synonyms: eyestrain |
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| asthenosphere | (noun) the lower layer of the crust | - |
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| astheny | (noun) an abnormal loss of strength | Synonyms: asthenia |
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| athenaeum | (noun) a place where reading materials are available | Synonyms: atheneum |
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| (noun) a literary or scientific association for the promotion of learning | Synonyms: atheneum |
| atheneum | (noun) a place where reading materials are available | Synonyms: athenaeum |
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| (noun) a literary or scientific association for the promotion of learning | Synonyms: athenaeum |
| authentication | (noun) validating the authenticity of something or someone | Synonyms: certification |
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| (noun) a mark on an article of trade to indicate its origin and authenticity | Synonyms: assay-mark, hallmark |
| authenticator | (noun) one who determines authenticity (as of works of art) or who guarantees validity | Synonyms: appraiser |
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| authenticity | (noun) undisputed credibility | Synonyms: genuineness, legitimacy |
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| blitheness | (noun) a feeling of spontaneous good spirits | Synonyms: cheerfulness |
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| burthen | (noun) a variant of `burden' | - |
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| calisthenics | (noun) the practice of calisthenic exercises | Synonyms: callisthenics |
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| (noun) light exercises designed to promote general fitness | Synonyms: callisthenics |
| callisthenics | (noun) the practice of calisthenic exercises | Synonyms: calisthenics |
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| (noun) light exercises designed to promote general fitness | Synonyms: calisthenics |
| earthenware | (noun) ceramic ware made of porous clay fired at low heat | - |
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| ethene | (noun) a flammable colorless gaseous alkene; obtained from petroleum and natural gas and used in manufacturing many other chemicals; sometimes used as an anesthetic | Synonyms: ethylene |
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| euthenics | (noun) the study of methods of improving human well-being and efficient functioning by improving environmental conditions | - |
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| heathen | (noun) a person who does not acknowledge your god | Synonyms: gentile, infidel, pagan |
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| heathenism | (noun) any of various religions other than Christianity or Judaism or Islamism | Synonyms: pagan religion, paganism |
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| lengthening | (noun) the act of prolonging something | Synonyms: perpetuation, prolongation, protraction |
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| litheness | (noun) the gracefulness of a person or animal that is flexible and supple | Synonyms: lissomeness, suppleness |
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| methenamine | (noun) antibacterial agent (trade names Mandelamine and Urex) that is contained in many products that are used to treat urinary infections | Synonyms: Mandelamine, Urex |
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| myasthenia | (noun) a chronic progressive disease characterized by chronic fatigue and muscular weakness (especially in the face and neck); caused by a deficiency of acetylcholine at the neuromuscular junctions | Synonyms: myasthenia gravis |
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| (noun) any muscular weakness | - |
| neurasthenia | (noun) nervous breakdown (not in technical use) | - |
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| neurasthenic | (noun) a person suffering a nervous breakdown | - |
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| pantothen | (noun) a vitamin of the vitamin B complex that performs an important role in the oxidation of fats and carbohydrates and certain amino acids; occurs in many foods | Synonyms: pantothenic acid |
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| parthenocarpy | (noun) (botany) the development of a fruit without fertilization or seeds | - |
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| parthenogenesis | (noun) process in which an unfertilized egg develops into a new individual; common among insects and some other arthropods | Synonyms: parthenogeny |
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| (noun) human conception without fertilization by a man | Synonyms: parthenogeny, virgin birth |
| parthenogeny | (noun) process in which an unfertilized egg develops into a new individual; common among insects and some other arthropods | Synonyms: parthenogenesis |
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| (noun) human conception without fertilization by a man | Synonyms: parthenogenesis, virgin birth |
| parthenote | (noun) a cell resulting from parthenogenesis | - |
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| polythene | (noun) a lightweight thermoplastic; used especially in packaging and insulation | Synonyms: polyethylene |
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| ruthenium | (noun) a rare polyvalent metallic element of the platinum group; it is found associated with platinum | Synonyms: atomic number 44, Ru |
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| sthene | (noun) a unit of force equal to 1000 newtons | - |
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| strengthener | (noun) a device designed to provide additional strength | Synonyms: reinforcement |
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| strengthening | (noun) the act of increasing the strength of something | - |
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| (noun) becoming stronger | - |
| then | (noun) that time; that moment | - |
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| thenar | (noun) the inner surface of the hand from the wrist to the base of the fingers | Synonyms: palm |
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| (noun) the fleshy area of the palm at the base of the thumb | - |
| thrombasthenia | (noun) a rare autosomal recessive disease in which the platelets do not produce clots in the normal way and hemorrhage results | - |
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