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tortoiseshell

(Encyclopedia)tortoiseshell, horny, translucent, mottled plates covering the carapace of the tropical hawksbill turtle. The plates, too thin for most purposes in their original form, are usually built up in layers ...

equestrianism

(Encyclopedia)equestrianism, art of riding and handling a horse. Horseback riding was practiced as far back as the Bronze Age and was thereafter adapted to commerce, industry, war, sport, and recreation. Diverse st...

Rolph, John

(Encyclopedia)Rolph, John rŏlf [key], 1793–1870, Canadian physician and politician, b. England. He studied law and medicine in England and served in the Legislative Assembly of Upper Canada (1824–30, 1836–37...

human papillomavirus

(Encyclopedia)human papillomavirus (HPV), any of a family of more than 100 viruses that cause various growths, including plantar warts and genital warts, a sexually transmitted disease. Genital warts, sometimes cal...

virology

(Encyclopedia)virology, study of viruses and their role in disease. Many viruses, such as animal RNA viruses and viruses that infect bacteria, or bacteriophages, have become useful laboratory tools in genetic studi...

biochemistry

(Encyclopedia)biochemistry, science concerned chiefly with the chemistry of biological processes; it attempts to utilize the tools and concepts of chemistry, particularly organic and physical chemistry, for elucida...

Theiler, Max

(Encyclopedia)Theiler, Max mäks tīlˈər [key], 1899–1972, South African–American research physician, b. Pretoria, educated at the Univ. of Cape Town, St. Thomas's Hospital (London), and the London School of ...

interferon

(Encyclopedia)interferon ĭnˌtərfērˈŏn [key], any of a group of proteins produced by cells in the body in response to an attack by a virus. A cell infected by a virus releases minute amounts of interferons, wh...

Edinburgh, University of

(Encyclopedia)Edinburgh, University of, at Edinburgh, Scotland; founded 1583. It has faculties of divinity, law, medicine, arts, science, music, social sciences, and veterinary medicine. The Institute for Advanced ...

eider, in zoology

(Encyclopedia)eider: see duck.