Parasitic Diseases. Photo by: Jubal Harshaw. Parasitic diseases are illnesses caused by infestation (infection) with parasites such as protozoa (one-celled animals), worms, or insects. These diseases are widespread in Africa, southern Asia, and Central and South America, especially among children.arasitic Diseases. Photo by: Jubal Harshaw. Parasitic diseases are illnesses caused by infestation (infection) with parasites such as protozoa (one-celled animals), worms, or insects. These diseases are widespread in Africa, southern Asia, and Central and South America, especially among children.
Definitions for tectonictÉkËtÉn Éªk. tectonic(adj) pertaining to the structure or movement of the earth's crust. tectonic plates; tectonic valleys. tectonic, architectonic(adj) of or pertaining to construction or architecture.
plate tectonics in Science Expand. plate tectonics in Culture Expand. plate tectonics [(tek-ton-iks)] In geology, a theory that explains the distribution of continents, earthquakes, volcanoes,, mountains and other geologic phenomena in terms of the formation, movement, and destruction of tectonic plates.