sliding fit
21arts, East Asian — Introduction music and visual and performing arts of China, Korea, and Japan. The literatures of these countries are covered in the articles Chinese literature, Korean literature, and Japanese literature. Some studies of East Asia… …
22glacier — glaciered, adj. /glay sheuhr/, n. an extended mass of ice formed from snow falling and accumulating over the years and moving very slowly, either descending from high mountains, as in valley glaciers, or moving outward from centers of… …
23Plate tectonics — The tectonic plates of the world were mapped in the second half of the 20th century …
24Motorcycle safety clothing — To improve motorcycle safety many countries mandate the wearing of protective clothing by motorcyclists, especially a helmet. Other protective gear may include certain types of jackets, gloves, boots, and pants. Jackets meant for motorcyclists… …
25Lock (water transport) — Canal lock and lock keeper s cottage on the Aylesbury Arm of the Grand Union Canal at Marsworth in Hertfordshire, England …
26theatre — /thee euh teuhr, theeeu /, n. theater. * * * I Building or space in which performances are given before an audience. It contains an auditorium and stage. In ancient Greece, where Western theatre began (5th century BC), theatres were constructed… …
27gasoline engine — Most widely used form of internal combustion engine, found in most automobiles and many other vehicles. Gasoline engines vary significantly in size, weight per unit of power generated, and arrangement of components. The principal type is the… …
28Dovetail joint — For other uses, see Dovetail (disambiguation). Dovetailed woodworking joints on a Romanian church …
29artillery — /ahr til euh ree/, n. 1. mounted projectile firing guns or missile launchers, mobile or stationary, light or heavy, as distinguished from small arms. 2. the troops or the branch of an army concerned with the use and service of such weapons. 3.… …
30Friction — For other uses, see Friction (disambiguation). Classical mechanics …
