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harmonic motion

(Encyclopedia)CE5 Harmonic motion is exhibited by a weight vibrating on the end of a spring. In A, the displacement of the object from its equilibrium position and the acceleration of the object are at a maximum...

motion sickness

(Encyclopedia)motion sickness, waves of nausea and vomiting experienced by some people, resulting from the sudden changes in movement of a vehicle. The ailment is also known as seasickness, car sickness, train sick...

retrograde motion

(Encyclopedia)retrograde motion, in astronomy, real or apparent movement of a planet, dwarf planet, moon, asteroid, or comet from east to west relative to the fixed stars. The most common direction of motion in the...

motion pictures

(Encyclopedia)motion pictures, movie-making as an art and an industry, including its production techniques, its creative artists, and the distribution and exhibition of its products (see also motion picture photogr...

blue laws

(Encyclopedia)blue laws, legislation regulating public and private conduct, especially laws relating to Sabbath observance. The term was originally applied to the 17th-century laws of the theocratic New Haven colon...

game laws

(Encyclopedia)game laws, restrictions on the hunting or capture of wild game, whether bird, beast, or fish. After the Norman Conquest (1066), England enacted stringent game laws, known as the Forest Laws, which mad...

corn laws

(Encyclopedia)corn laws, regulations restricting the export and import of grain, particularly in England. As early as 1361 export was forbidden in order to keep English grain cheap. Subsequent laws, numerous and co...

sumptuary laws

(Encyclopedia)sumptuary laws sŭmpˈcho͞oĕˌrē [key], regulations based on social, religious, or moral grounds directed against overindulgence of luxury in diet and drink and extravagance in dress and mode of li...

agrarian laws

(Encyclopedia)agrarian laws, in ancient Rome, the laws regulating the disposition of public lands (ager publicus). It was the practice of Rome to confiscate part of the land of conquered cities and states, and this...

Penal Laws

(Encyclopedia)Penal Laws, in English and Irish history, term generally applied to the body of discriminatory and oppressive legislation directed chiefly against Roman Catholics but also against Protestant nonconfor...