Based in Sevres, France, the International Bureau of Weights and Measures serves as a depository for the primary international standards and as a laboratory for certification and intercomparison of national standard copies. In 1960, the SI system was built upon the metre-kilogram second system, which has seven basic units. These are :
Histology: The study of tissues.
Horticulture: The cultivation of flowers, fruits, vegetables and ornamental plants.
Hydrodynamics: The mathematical study of the forces, energy and pressure of liquid in motion.
Hydrography: The science of water measurements of the earth with special reference to their use for navigation.
Hydrology: The study of water with reference to its occurrence and properties in the hydrosphere and atmosphere.
Hydrometallurgy: The process of extracting metals at ordinary temperature by bleaching ore with liquids.
Hydrometeorology: The study of the occurrence, movement and changes in the state of water in the atmosphere.
Hydropathy: The treatment of disease by the internal and external use of water.
Hydroponics: The cultivation of plants by placing the roots in liquid nutrient solutions rather than in soil.
Hydrostatics: The mathematical study of forces and pressures in liquids.
Hygiene: The science of health and its preservation.
Limnology : The study of lakes.
Lithology : A systematic study of rocks.
Mammography: Radiography of the mammary glands.
Metallography: The study of the crystalline structures of metals and alloys.
Metallurgy: The process of
extracting metals from their ores.
Meteorology: The science of the atmosphere and its phenomena.
Metrology: The scientific study of weights and measures.
Microbiology7: The study of minute living organisms, including bacteria, moulds and pathogenic protozoa.
Molecular Biology: The study of die structure of the molecules which are of importance in biology.
Morphology: The science of organic forms and structures.
Mycology: The study of fungi and fungus diseases.
Nanotechnology: The technology that is based on the scale of nanometres (10’9m).
Neurology: The study of the nervous system, its functions and disorders.
Neuropathology: The study of diseases of the nervous system.
Nosology : The branch of medicine that deals with the classification of diseases.
Numerology: The study of numbers. The study of the date and year of one’s birth and their influence on one’s future life.
Ecology: The study of the relation of animals and plants to their surroundings, animate and inanimate.
Electronics : The study of the development, behaviour and applications of electronic devices and circuits.
Electrostatics : The study of static electricity.
Embryology: The study of
development of embryos.
Entomology: The study of insects.
Epidemiology: The branch of medicine dealing with epidemic diseases.
Ethnography: A branch of
anthropology dealing with the scientific description of individual cultures.
Ethnology: A branch of
anthropology that deals with the origin, distribution and distinguishing characteristics of the races of
mankind.
Ethology: The study of animal behaviour.
Eugenics: The study of the
production of better offspring by the careful selection of parents.
Fractography : The study of fractures in metal surfaces.
Genealogy: The study of family origins and history. It includes the compilation of lists of ancestors and arranging them in pedigree charts.
Genecology: The study of genetical composition of plant population in relation to their habitats.
Genesiology: The science of
generation.
Genetics: The branch of biology dealing with the phenomena of heredity and the laws governing it.
Geobiology: The biology of
terrestrial life.
Geobotany: The branch of botany dealing with all aspects of relations between plants and the earth’s surface.
Geochemistry: The study of the chemical composition of the earth’s crust and the changes which take place within it.
Geodesy: Methods of surveying the earth for making maps and correlating geological, gravitational and magnetic measurements. It is a branch of geo-physics.
Geography: The development of science of the earth’s surface, physical features, climate, population, etc.
Geology: The science that deals with the physical history of the earth.
Geomedicine: The branch of medicine dealing with the influence of climate and environmental conditions on health.
Geomorphology: The study of the characteristics, origin and development of land forms.
Geophysics: The physics of the earth.
Gerontology: The study of old age, its phenomena, diseases, etc.
Glaciology: The study of ice and the action of ice in all its forms
Gynaecology : The study of diseases of women’s reproductive organs.
Chemotherapy: The treatment of disease by using chemical substances.
Chronobiology: The study of the duration of life.
Chronology: The science of
arranging time in periods and ascertaining the dates and historical order of past events.
Climatotherapy : The treatment of disease through suitable climatic environment, often, but not always, found in recognised health resorts. As climate is subject to seasonal variations, the required environment may have to be sought in different localities at different periods of the year.
Conchology: The branch of zoology dealing â– with the shells of molluscs.
Cosmogony: The science of the nature of heavenly bodies.
Cosmography: The science that describes and maps the main features of the Universe.
Cosmology: The science of the nature, origin and history of the Universe.
Cryobiology : The science that deals with the study of organisms, especially warm-blooded animals, at low temperature. The principal effect of cold on living tissues is destruction of life or preservation of it at a reduced level of activity.
Cryogenics: The science dealing with the production, control and application of very low temperatures.
Cryotherapy : Use of cold, but not freezing cold, as a form of treatment. Hypothermia may be deliberately induced during surgery, for instance, to decrease a patient’s oxygen requirement.
Cryptography: The study of cyphers or codes (secret writings).
Crystallography: The study of the structure, forms and properties of crystals.
Cytochemistry: The branch of cytology dealing with the chemistry of cells.
Cytogenetics: The branch of biology dealing with the study of heredity from the point of view of cytology and genetics.
Cytology: The study of cells, especially their formation, structure and functions.
D actylography: The study of fingerprints for the purpose of identification.
Dermatology : The study of skin and skin diseases.
Astrology: The ancient art (now mostly termed a pseudo-science) of predicting the course of human destinies with the help of indications deduced from the position and movement of the heavenly bodies.
Astronautics: The science involved in space travel.
Astronomy: The study of the heavenly bodies.
Astrophysics: The branch of
astronomy concerned with the physical nature of heavenly bodies.
Autoecology : The study of the ecology of species.
Bacteriology: The study of bacteria.
Biochemistry: The study of chemical processes of living things.
Bioclimatology : The study of the effects of climate upon living organisms.
Bioinformatics: The creation and maintenance of the databases of biological information by the usage of advanced computing systems.
Biology: The study of living things, of both flora and fauna.
Biomechanics: The study of the mechanical laws relating to the movement or structure of living organisms.
Biometeorology: The study of the effectsof atmospheric conditions on living organisms.
Biometry: The application of
mathematics to die study of living things.
Bionics: The study of functions, characteristics and phenomena observed in the living world and the application of this knowledge to the world of machines.
Bionomics: The study of the relation of an organism to its environments.
Bionomy: The science of the laws of life.
Biophysics: The physics of vital processes (living things).
Biotechnology: The use of living organisms or other biological systems in the manufacture of drugs or other products or for environmental management.
Botany: The study of plants.
Ceramics: The art and technology of making objects from clay, etc. (pottery).
Chemistry: The study of elements and their laws of combination and behaviour.
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