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lymphoma, non-Hodgkin's

(Encyclopedia)lymphoma, non-Hodgkin's, any cancer of the lymphoid tissue (see lymphatic system) in which the Reed-Sternberg cells characteristic of Hodgkin's disease (the other category of lymphoma) are not present...

arthritis

(Encyclopedia)arthritis, painful inflammation of a joint or joints of the body, usually producing heat and redness. There are many kinds of arthritis. In its various forms, arthritis disables more people than any o...

SARS

(Encyclopedia)SARS or severe acute respiratory syndrome, communicable viral disease that can progress to a potentially fatal pneumonia. The first symptoms of SARS are usually a high fever, headache and body aches, ...

Henry VII, Holy Roman emperor and German king

(Encyclopedia)Henry VII, c.1275–1313, Holy Roman emperor (1312–13) and German king (1308–13). A minor count of the house of Luxembourg, Henry was elected German king on the death of King Albert I after the el...

Lee, Spike

(Encyclopedia)Lee, Spike (Shelton Jackson Lee), 1957–, African-American filmmaker, b. Atlanta, Ga. As a student at New York Univ., he won recognition with his gradu...

louse

(Encyclopedia)louse, common name for members of either of two distinct orders of wingless, parasitic, disease-carrying insects. Lice of both groups are small and flattened with short legs adapted for clinging to th...

hypersensitivity

(Encyclopedia)hypersensitivity, heightened response in a body tissue to an antigen or foreign substance. The body normally responds to an antigen by producing specific antibodies against it. The antibodies impart i...

Escherichia coli

(Encyclopedia)Escherichia coli ĕshˌərĭkˈēə kōˈlī [key], common bacterium that normally inhabits the intestinal tracts of humans and animals, but can cause infection in other parts of the body, especially ...

COVID-19

(Encyclopedia)COVID-19, contagious viral disease caused by severe acute respiratory syndrome coronavirus 2, or SARS-CoV-2, a coronavirus that is genetically related to SARS-CoV, which causes SARS. Symptoms generall...

Henry VI, Holy Roman emperor and German king

(Encyclopedia)Henry VI, 1165–97, Holy Roman emperor (1191–97) and German king (1190–97), son and successor of Holy Roman Emperor Frederick I (Frederick Barbarossa). He was crowned German king at Aachen in 116...