| HYDRARTHROSIS | • hydrarthrosis n. (Medicine) An effusion of watery liquid into the cavity of a joint. • HYDRARTHROSIS n. swelling of a joint caused by the accumulation in it of watery fluid.
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| HYDROPATHISTS | • hydropathists n. Plural of hydropathist. • HYDROPATHIST n. one who treats with hydropathy.
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| HYPOGNATHISMS | • HYPOGNATHISM n. the state of being hypognathous. | 
| HYPSOGRAPHIES | • HYPSOGRAPHY n. the branch of geography dealing with the measurement and mapping of heights above sea level. | 
| ICHTHYOSAURUS | • ichthyosaurus n. (Archaic) Alternative form of ichthyosaur. • ichthyosaurus n. Any members of the genus Ichthyosaurus.
 • Ichthyosaurus prop.n. A taxonomic genus within the family Ichthyosauridae – large, extinct marine reptiles.
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| OSTEICHTHYANS | • osteichthyans n. Plural of osteichthyan. • OSTEICHTHYAN n. a bony fish.
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| PHOSPHATIDYLS | • phosphatidyls n. Plural of phosphatidyl. • PHOSPHATIDYL n. any of several monovalent groups that are derived from phosphatidic acids.
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| PSYCHOMACHIAS | • psychomachias n. Plural of psychomachia. • PSYCHOMACHIA n. conflict of the soul.
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| PSYCHOMACHIES | • psychomachies n. Plural of psychomachy. • PSYCHOMACHY n. conflict of the soul.
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| PSYCHOPATHICS | • psychopathics n. Plural of psychopathic. • PSYCHOPATHIC n. a psychopath.
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| PSYCHOPATHIES | • psychopathies n. Plural of psychopathy. • PSYCHOPATHY n. the state of being a psychopath.
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| PSYCHOPATHIST | • psychopathist n. (Medicine, dated) One who studies mental illness. • PSYCHOPATHIST n. a student of psychopathology.
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| SCHIZOTHYMIAS | • SCHIZOTHYMIA n. schizoid behavior that resembles schizophrenia in the tendency toward autistic thinking but remains within normal limits. | 
| STICHOMYTHIAS | • stichomythias n. Plural of stichomythia. • STICHOMYTHIA n. dialogue in alternate lines, also STICHOMYTHY.
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