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antisense

(Encyclopedia)antisense, DNA or RNA manipulated in a laboratory so that its components (nucleotides) form a complementary copy of normal, or “sense,” messenger RNA (mRNA; see nucleic acid). Antisense techniques...

hydrocortisone

(Encyclopedia)hydrocortisone hīˌdrəkôrˈtĭzōnˌ [key], another name for the steroid hormone cortisol, more especially used to refer to preparations of this hormone used medicinally. Hydrocortisone, introduced...

ibuprofen

(Encyclopedia)ibuprofen īˈbyo͞oprōˌfən [key], nonsteroidal anti-inflammatory drug (NSAID) that reduces pain, fever, and inflammation. Along with naproxen and ketoprofen, ibuprofen belongs to the propionic aci...

sonic boom

(Encyclopedia)CE5 Sonic boom wave pattern from a supersonic aircraft and variation in pressure sonic boom, shock wave produced by an object moving through the air at supersonic speed, i.e., faster than the spee...

Southcott, Joanna

(Encyclopedia)Southcott, Joanna southˈkət [key], 1750–1814, English religious visionary. Uneducated, even illiterate, she spent her earlier years in domestic service. She began c.1792 to claim the gift of proph...

Witz, Conrad

(Encyclopedia)Witz, Conrad kônˈrät vĭts [key], fl. c.1434–c.1447, German painter, active at Basel and Geneva. Many of the works attributed to him, such as The Synagogue and the Meeting of Joachim and Anna, ca...

Cézanne, Paul

(Encyclopedia)Cézanne, Paul pōl sāzänˈ [key], 1839–1906, French painter, b. Aix-en-Provence. Cézanne was the leading figure in the revolution toward abstraction in modern painting. Cézanne's influence on...

narcotic

(Encyclopedia)narcotic, any of a number of substances that have a depressant effect on the nervous system. The chief narcotic drugs are opium, its constituents morphine and codeine, and the morphine derivative hero...

etching

(Encyclopedia)etching, the art of engraving with acid on metal; also the print taken from the metal plate so engraved. In hard-ground etching the plate, usually of copper or zinc, is given a thin coating or ground ...

panic

(Encyclopedia)panic, crisis in financial and economic conditions, marked by public loss of confidence in the financial structure. Panics are characterized by a general rush of investors to convert their assets into...