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Bell, Gertrude Margaret Lowthian

(Encyclopedia)Bell, Gertrude Margaret Lowthian lōˈᵺēən [key], 1868–1926, British traveler, author, and government official, one of the builders of the modern state of Iraq, grad. Oxford, 1887. From 1899 on ...

pantomime

(Encyclopedia)pantomime or mime pănˈtəmīm [key] [Gr.,=all in mimic], silent form of the drama in which the story is developed by movement, gesture, facial expression, and stage properties. It is known to have e...

continental drift

(Encyclopedia)CE5 Continental drift (arrows indicate the directions of motion of the landmasses) A. Proposed reconstruction of the supercontinent Pangaea indicating the major present landmasses B. Proposed recon...

diffusion

(Encyclopedia)diffusion, in chemistry, the spontaneous migration of substances from regions where their concentration is high to regions where their concentration is low. Diffusion is important in many life process...

parallax

(Encyclopedia)CE5 The trigonometric parallax of a star, expressed by the angle θ, is a measure of its apparent motion against the background of more distant stars as a result of the earth's motions in its orbit...

friction

(Encyclopedia)friction, resistance offered to the movement of one body past another body with which it is in contact. In certain situations friction is desired. Without friction the wheels of a locomotive could not...

acetic acid

(Encyclopedia)acetic acid əsēˈtĭk [key], CH3CO2H, colorless liquid that has a characteristic pungent odor, boils at 118℃, and is miscible with water in all proportions; it is a weak organic carboxylic acid (s...

magnetic pole

(Encyclopedia)magnetic pole, the two roughly opposite ends of the planet where the earth's magnetic intensity is the greatest, as the north and south magnetic poles. For the magnetic north, it is the direction from...

Toland, John

(Encyclopedia)Toland, John tōˈlənd [key], 1670–1722, British deist, b. Ireland. Brought up a Roman Catholic, Toland became a Protestant at 16. He studied at Glasgow, Edinburgh, and Leiden and after 1694 lived ...

differential

(Encyclopedia)differential, in the automobile, a set of gears used on the driving (usually rear) axle. The two wheels on the driving axle must be interconnected in order to receive their energy from the same source...