| ANDROGYNOUSLY | • androgynously adv. In an androgynous manner. | 
| DACTYLIOLOGY | • dactyliology n. The branch of archaeology dealing with gem engraving. • dactyliology n. The branch of archaeology dealing with finger rings.
 • DACTYLIOLOGY n. the study of finger-rings.
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| DACTYLOLOGY | • dactylology n. The use of the fingers and hands to communicate ideas, especially by the deaf. • DACTYLOLOGY n. the study of sign language.
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| DYSTELEOLOGY | • dysteleology n. (Philosophy) The view that existence has no telos or final cause from purposeful design. • dysteleology n. The study of apparently functionless rudimentary organs in animals and plants.
 • DYSTELEOLOGY n. the study of functionless rudimentary organs in animals and plants.
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| GEOHYDROLOGY | • geohydrology n. (Geology) hydrogeology. • GEOHYDROLOGY n. a science that deals with the character, source, and mode of occurrence of underground water.
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| GYNANDROMORPHY | • gynandromorphy n. Gynandromorphism. • GYNANDROMORPHY n. the state of being gynandromorph, an animal having both male and female characteristics.
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| GYPSYHOOD | • GYPSYHOOD n. the state of being a gypsy, also GIPSYHOOD. | 
| GYPSYHOODS | • GYPSYHOOD n. the state of being a gypsy, also GIPSYHOOD. | 
| HYDROBIOLOGY | • hydrobiology n. (Biology) The study of the biology of the organisms that inhabit bodies of water. • HYDROBIOLOGY n. the study of aquatic organisms.
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| HYDROGENOLYSES | • hydrogenolyses n. Plural of hydrogenolysis. • HYDROGENOLYSIS n. a chemical reaction in which a compound is decomposed by hydrogen.
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| HYDROGENOLYSIS | • hydrogenolysis n. (Chemistry) the cleavage of a molecule, especially that of a carbon-carbon bond, with the addition of… • HYDROGENOLYSIS n. a chemical reaction in which a compound is decomposed by hydrogen.
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| HYDROGEOLOGY | • hydrogeology n. The geology of groundwater, especially concerning the physical, biological and chemical properties of… • HYDROGEOLOGY n. the study of the geological action of water.
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| HYDROLOGICALLY | • hydrologically adv. With regard to hydrology. • HYDROLOGICAL adv. relating to hydrology, also HYDROLOGIC.
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| HYDROLOGY | • hydrology n. The science of the properties, distribution, and effects of water on a planet’s surface, in the soil… • hydrology n. The properties, distribution, and flows of water in a specific locale; the hydrological characteristics…
 • HYDROLOGY n. the study of water resources.
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| OXYHYDROGEN | • oxyhydrogen adj. Of, or using a mixture of, hydrogen and oxygen. • oxyhydrogen n. (Chemistry) A potentially explosive mixture of hydrogen and oxygen.
 • oxy-hydrogen n. Alternative spelling of oxyhydrogen.
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| OXYHYDROGENS | • OXYHYDROGEN n. a mixture of hydrogen and oxygen used to provide an intense flame for welding. | 
| PYRAMIDOLOGY | • pyramidology n. The study of pyramids (especially the Egyptian pyramids) from a supernatural or new-age perspective… • PYRAMIDOLOGY n. the study of the Egyptian pyramids.
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| ZYGODACTYLOUS | • zygodactylous adj. (Ornithology) Having two toes pointing forward, and two toes pointing backward. • ZYGODACTYLOUS adj. of or like a zygodactyl, having two toes pointing forward and two backwards.
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