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hat

(Encyclopedia)hat, headdress developed from the simple close-fitting cap and hood of antiquity. The first hat, which was distinguished as such by having a brim, was the felt petasus of the Greeks, which tied under ...

gear

(Encyclopedia)CE5 Types of gears gear, toothed wheel, cylinder, or cone that transmits motion from one part of a machine to another; it is one of the oldest means of transmitting motion. When the teeth of two g...

Pretoria

(Encyclopedia)Pretoria prĭtôˈrēə [key], city, Gauteng prov., administrative capital of South Africa and formerly capital of Transvaal. Pretoria is now part and seatof the City of Tshwane metropolitan municipal...

Troy , cities, United States

(Encyclopedia)Troy. 1 City (1990 pop. 13,051), seat of Pike co., SE Ala., on the Conecuh River; inc. 1843. Products include lumber and wood items, textiles, truck bodies, feed, plastics, and pecans. Troy Univ. and ...

Winnipeg, city, Canada

(Encyclopedia)Winnipeg wĭnˈĭpĕg [key], city (1991 pop. 616,790), provincial capital, SE Man., Canada, at the confluence of the Red and Assiniboine rivers. It is the province's largest city and one of the world'...

suburb

(Encyclopedia)suburb, a community in an outlying section of a city or, more commonly, a nearby, politically separate municipality with social and economic ties to the central city. In the 20th cent., particularly i...

Karachi

(Encyclopedia)Karachi kəräˈchē [key], city (1998 pop. 9,269,265), largest city and former capital of Pakistan, SE Pakistan, on the Arabian Sea near the Indus River delta. The capital of Sind prov., it is Pakist...

hotel

(Encyclopedia)hotel [Fr., from O.Fr. (origin of Eng. hostel), from Latin (origin of Eng. hospital),=guest place], name applied since the late 17th cent. to an establishment supplying both food and lodging to the pu...

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...

automation

(Encyclopedia)automation, automatic operation and control of machinery or processes by devices, such as robots that can make and execute decisions without human intervention. The principal feature of such devices i...