| | - acromegaly
- growth and metabolic disorder characterized by enlargement of the skeletal extremities. It is the result of overproduction of pituitary growth hormone (somatotropin) after maturity, caused by a tumour of the ...
- acropolis
- (Greek: "city at the top"), central, defensively oriented district in ancient Greek cities, located on the highest ground and containing the chief municipal and religious buildings. Because the founding of ...
- Acropolites, George
- Byzantine scholar and statesman, the author of Chronike Syngraphe ("Written Chronicle"), a history of the Byzantine Empire from 1203 to 1261. He also played a major diplomatic ...
- acrostic
- short verse composition, so constructed that the initial letters of the lines, taken consecutively, form words. The term is derived from the Greek words akros, "at the end," and stichos,"line," ...
- acroterion
- in architecture, decorative pedestal for an ornament or statue placed atop the pediment of a Greek temple; the term has also been extended to refer to the statue or ornament ...
- acrylic compound
- any of a class of synthetic plastics, resins, and oils used to manufacture many products. By varying the starting reagents and the process of forming, a material may be produced ...
- acrylic painting
- painting executed in the medium of synthetic acrylic resins. Acrylics dry rapidly, serve as a vehicle for any kind of pigment, and are capable of giving both the transparent brilliance ...
- Act of Parliament clock
- plain, hanging, weight-driven wall clock with a large wooden, painted or lacquered dial. The term Act of Parliament clock was applied incorrectly to these timepieces, which were thought to have ...
- Acta
- (Latin: "Acts"), in ancient Rome, minutes of public business and gazette of political and social events. They were in two forms: Acta Senatus and Acta diurna.
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