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Borelli, Giovanni Alfonso

(Encyclopedia)Borelli, Giovanni Alfonso jōvänˈnē älfônˈsō bôrĕlˈlē [key], 1608–79, Italian physiologist, physicist, astronomer, and mathematician; son of a Spanish infantryman. His wide interests led ...

Ceiba, La

(Encyclopedia)Ceiba, La lä sāˈbä [key], city (1997 est. pop. 96,000), N Honduras, capital of Atlántida dept., on the Caribbean Sea. It is the commercial and processing center of a rich agricultural region domi...

toxin-antitoxin

(Encyclopedia)toxin-antitoxin, mixture of a poisonous substance, or toxin, with an antitoxin, or antibody, in such proportion that a large percentage of the toxin is neutralized by the antitoxin. Although formerly ...

radiology

(Encyclopedia)radiology, branch of medicine specializing in the use of X rays, gamma rays, radioactive isotopes, and other forms of radiation in the diagnosis and treatment of disease. X ray machines and fluoroscop...

Sakmann, Bert

(Encyclopedia)Sakmann, Bert, 1942–, German biophysicist, M.D. Univ. of Göttingen, Germany, 1974. He has been a researcher at the Max Planck Institute for Biophysical Chemistry in Göttingen since 1974. Sakmann r...

Sigerist, Henry Ernest

(Encyclopedia)Sigerist, Henry Ernest sĭgˈərĭst [key], 1891–1957, American medical historian and writer, b. Paris, M.D. Univ. of Zürich, 1917. He taught history of medicine at the universities of Zürich (192...

fetal tissue implant

(Encyclopedia)fetal tissue implant or fetal cell therapy, implantation of tissue from a fetus into a patient. In experimental procedures, fetal brain tissue has been implanted in the brains of patients with Parkins...

herpes simplex

(Encyclopedia)herpes simplex hûrˈpēz [key], an acute viral infection of the skin characterized by one or more painful, itching blisters filled with clear fluid. It is caused by either of two herpes simplex virus...

koala

(Encyclopedia)koala kōäˈlə [key], arboreal marsupial, or pouched mammal, Phascolarctos cinereus, native to Australia. Although it is sometimes called koala bear, or Australian bear, and is somewhat bearlike in ...

blindness

(Encyclopedia)blindness, partial or complete loss of sight. Blindness may be caused by injury, by lesions of the brain or optic nerve, by disease of the cornea or retina, by pathological changes originating in syst...