| ANTIARRHYTHMICS | • antiarrhythmics n. Plural of antiarrhythmic. • ANTIARRHYTHMIC n. a drug to prevent cardiac arrhythmia.
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| ARCHAEOPTERYXES | • archaeopteryxes n. Plural of archaeopteryx. • ARCHAEOPTERYX n. a Jurassic fossil bird of the Archaeopteryx genus, with a long bony tail, sharp-toothed jaws, and wings bearing three clawed digits.
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| ARCHEOASTRONOMY | • archeoastronomy n. Alternative spelling of archaeastronomy. • ARCHEOASTRONOMY n. the scientific study of the beliefs and practices concerning astronomy that existed in ancient and prehistoric civilizations.
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| BRACHYTHERAPIES | • brachytherapies n. Plural of brachytherapy. • BRACHYTHERAPY n. a medical procedure used in the treatment of prostate cancer.
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| CRYPTOGRAPHISTS | • cryptographists n. Plural of cryptographist. • CRYPTOGRAPHIST n. one who studies cryptographs.
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| CRYSTALLOGRAPHY | • crystallography n. The experimental science of determining the arrangement of atoms in solids. • crystallography n. The study of crystals.
 • CRYSTALLOGRAPHY n. a science that deals with the forms and structures of crystals.
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| DACTYLOGRAPHERS | • DACTYLOGRAPHER n. one who studies fingerprints. | 
| ECTOMYCORRHIZAS | • ectomycorrhizas n. Plural of ectomycorrhiza. • ECTOMYCORRHIZA n. a type of mycorrhiza in which the fungus forms a layer on the outside of the roots of the plant.
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| HYDROEXTRACTORS | • hydroextractors n. Plural of hydroextractor. • HYDROEXTRACTOR n. a drying machine that works centrifugally.
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| NEUROPSYCHIATRY | • neuropsychiatry n. (Medicine) The branch of medicine dealing with disorders that have both neurological and psychiatric features. • NEUROPSYCHIATRY n. a branch of medicine concerned with both neurology and psychiatry.
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| ORTHOPSYCHIATRY | • orthopsychiatry n. (Psychiatry) branch of psychiatry concerned with the prevention of mental illness, especially in the young. • ORTHOPSYCHIATRY n. preventive psychiatry for young people.
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| PREHISTORICALLY | • prehistorically adv. In a prehistoric manner. • prehistorically adv. Regarding prehistory.
 • PREHISTORICAL adv. relating to the time before historical records, also PREHISTORIC.
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| PSYCHOGERIATRIC | • psychogeriatric adj. Relating to psychogeriatrics. • PSYCHOGERIATRIC adj. relating to the study of the psychological problems of old age.
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| PSYCHROMETRICAL | • psychrometrical adj. Psychrometric. • PSYCHROMETRICAL adj. relating to measurement by psychrometer, also PSYCHOMETRIC, PSYCHOMETRICAL, PSYCHROMETRIC.
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| SPHAEROCRYSTALS | • sphaerocrystals n. Plural of sphaerocrystal. • SPHAEROCRYSTAL n. a rounded crystalline mass.
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