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stem cells

(Encyclopedia)stem cells, unspecialized human or animal cells that can produce mature specialized body cells and at the same time replicate themselves. Embryonic stem cells are derived from a blastocyst (the blastu...

body temperature

(Encyclopedia)body temperature, internal temperature of a living organism. Mammals and birds are termed warm-blooded, or homeothermic, i.e., they are able to maintain a relatively constant inner body temperature, w...

Medusa, in Greek mythology

(Encyclopedia)Medusa mədo͞oˈsə [key], in Greek mythology, most famous of the three monstrous Gorgon sisters. She was once a beautiful woman, but she offended Athena, who changed her hair into snakes and made he...

Henle, Jacob

(Encyclopedia)Henle, Jacob (Friedrich Gustav Jakob Henle) frēˈdrĭkh go͝osˈtäf yäˈkôp hĕnˈlə [key], 1809–85, German anatomist and histologist. A pupil of J. P. Müller, he taught at Zürich, Heidelberg...

Judas Iscariot

(Encyclopedia)Judas Iscariot ĭskârˈēət [key], Jesus' betrayer, possibly from the village of Kerioth, the only Judaean disciple among the Twelve, and, according to the Gospel of St. John, their treasurer. Judas...

Abu al-Abbas as-Saffah

(Encyclopedia)Abu al-Abbas as-Saffah äˈbo͞o äl-äbäsˈ äs-säfäˈ [key], d. 754, 1st Abbasid caliph (749–54). Raised to the caliphate by the armed might of Abu Muslim, he took the reign name as-Saffah [she...

Cohnheim, Julius

(Encyclopedia)Cohnheim, Julius yo͞oˈlyo͝os kōnˈhīm [key], 1839–84, German experimental histologist and pathologist. In a relatively brief life Cohnheim made a series of remarkable contributions to the rapid...

emetic

(Encyclopedia)emetic əmĕtˈĭk [key], substance that produces vomiting. Direct, or gastric, emetics, which act directly on the stomach, include syrup of ipecac, sulfate of zinc or copper, alum, ammonium carbonate...

Schleicher, Kurt von

(Encyclopedia)Schleicher, Kurt von, 1882–1934, German general. A leading Reichswehr (army) figure after World War I, Schleicher wielded great power in the years before Adolf Hitler came to power (1933). He was wa...

Agre, Peter Courtland

(Encyclopedia)Agre, Peter Courtland, 1949–, American molecular biologist, b. Northfield, Minn., M.D. Johns Hopkins, 1974. From 1981 to 2005, Agre taught at Johns Hopkins in the departments of medicine and cell bi...