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. noun plural but singular in construction. Tweet. geology: a scientific theory that the Earth's surface is made of very large sections that move very slowly; also: the movements of the large sections that form the Earth's surface.