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 ■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.