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e-commerce

(Encyclopedia)e-commerce, commerce conducted over the Internet, most often via the World Wide Web. E-commerce can apply to purchases made through the Web or to business-to-business activities such as inventory tran...

growth hormone

(Encyclopedia)growth hormone or somatotropin sōmătˌətrōˈpən [key], glycoprotein hormone released by the anterior pituitary gland that is necessary for normal skeletal growth in humans (see protein). Evidence...

Justinian I

(Encyclopedia)Justinian I jŭstĭnˈēən [key], 483–565, Byzantine emperor (527–65), nephew and successor of Justin I. He was responsible for much imperial policy during his uncle's reign. Soon after becoming ...

stimulant

(Encyclopedia)stimulant, any substance that causes an increase in activity in various parts of the nervous system or directly increases muscle activity. Cerebral, or psychic, stimulants act on the central nervous s...

work

(Encyclopedia)work, in physics and mechanics, transfer of energy by a force acting to displace a body. Work is equal to the product of the force and the distance through which it produces movement. Although both fo...

Moscow, grand duchy of

(Encyclopedia)Moscow or Muscovy, grand duchy of, state existing in W central Russia from the late 14th to mid-16th cent., with the city of Moscow as its nucleus. Its formation and eventual ascendancy over other Rus...

Cook Islands

(Encyclopedia)Cook Islands, island group (2021 est. pop. 17,564), 90 sq mi (234 sq km), S Pacific, SE of Samoa; a self-governing state in free association with New Ze...

class action

(Encyclopedia)class action, in law, a device that permits one or more persons to sue or be sued as representative of a large group of people interested in the matter at issue. The court in whose jurisdiction a suit...

glacial periods

(Encyclopedia)glacial periods, times during which large portions of the earth's surface were covered with thick glacial ice sheets. In the Pleistocene epoch, in the Carboniferous and Permian periods of the Paleozoi...

Diadochi

(Encyclopedia)Diadochi dīădˈəkī [key] [Gr.,=successors], the Macedonian generals and administrators who succeeded Alexander the Great. Alexander's empire, the largest that the world had known to that time, was...