Columbia Encyclopedia

Search results

458 results found

perfume

(Encyclopedia)perfume, aroma produced by the essential oils of plants and by synthetic aromatics. The burning of incense that accompanied the religious rites of ancient China, Palestine, and Egypt led gradually to ...

Story, Joseph

(Encyclopedia)Story, Joseph, 1779–1845, American jurist, associate justice of the Supreme Court (1811–45), b. Marblehead, Mass. Admitted to the Massachusetts bar in 1801, he practiced law in Salem and was sever...

glycoprotein

(Encyclopedia)glycoprotein glīˌkōprōˈtēn [key], organic compound composed of both a protein and a carbohydrate joined together in covalent chemical linkage. These structures occur in many life forms; they are...

gonadotropic hormone

(Encyclopedia)gonadotropic hormone gōˌnădətrŏpˈĭk [key] or gonadotropin, any one of three glycoprotein (see protein) hormones released by either the anterior pituitary gland or the placenta (the organ in whi...

barium

(Encyclopedia)barium bârˈēəm [key] [Gr.,=heavy], metallic chemical element; symbol Ba; at. no. 56; at. wt. 137.327; m.p. 725℃; b.p. 1,640℃; sp. gr. 3.5 at 20℃; valence +2. Barium is a soft, silver-white, ...

silicate

(Encyclopedia)silicate, chemical compound containing silicon, oxygen, and one or more metals, e.g., aluminum, barium, beryllium, calcium, iron, magnesium, manganese, potassium, sodium, or zirconium. Silicates may b...

Pauling, Linus Carl

(Encyclopedia)Pauling, Linus Carl pôˈlĭng [key], 1901–94, American chemist, b. Portland, Oreg. He was one of the few recipients of two Nobel Prizes, winning the chemistry award in 1954 and the peace prize in 1...

Reiner, Carl

(Encyclopedia) Reiner, Carl, 1922-2020, American comedian, television producer, actor, and film director, b. Bronx, N.Y. The son of a watchmaker, Reiner initially wo...

Qaddafi, Muammar al-

(Encyclopedia)Qaddafi, Muammar al- mo͞oäm-märˈ äl-käd-däˈfē [key], 1942–2011, Libyan army officer and dictator. He graduated from the Univ. of Libya in 1963 and became an army officer in 1965. In 1969 he...

immunosuppressive drug

(Encyclopedia)immunosuppressive drug, any of a variety of substances used to prevent production of antibodies. They are commonly used to prevent rejection by a recipient's body of an organ transplanted from a donor...