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syphilis

(Encyclopedia)syphilis sĭfˈəlĭs [key], contagious sexually transmitted disease caused by the spirochete Treponema pallidum (described by Fritz Schaudinn and Erich Hoffmann in 1905). Syphilis was not widely reco...

Ptolemaic system

(Encyclopedia)Ptolemaic system tŏlˌəmāˈĭk [key], historically the most influential of the geocentric cosmological theories, i.e., theories that placed the earth motionless at the center of the universe with a...

Anthropocene

(Encyclopedia)Anthropocene Epoch, an unofficial term used by scientists to describe a period of time—up to the present—in which humanity has impacted the planet on a global scale. The phrase was fir...

canoe

(Encyclopedia)canoe kəno͞oˈ [key], long, narrow watercraft with sharp ends originally used by most peoples. It is usually propelled by means of paddles, although sails and, more recently, outboard motors are als...

diet, in nutrition

(Encyclopedia)diet, food and drink regularly consumed for nourishment. Nutritionists generally recommend eating a wide variety of foods; however, some groups of people survive on a very limited diet. The traditiona...

divorce

(Encyclopedia)divorce, partial or total dissolution of a marriage by the judgment of a court. Partial dissolution is a divorce “from bed and board,” a decree of judicial separation, leaving the parties official...

refrigeration

(Encyclopedia)CE5 Compression system of refrigeration refrigeration, process for drawing heat from substances to lower their temperature, often for purposes of preservation. Refrigeration in its modern, portabl...

illustration

(Encyclopedia)illustration, any type of picture or decoration used in conjunction with a text to embellish its appearance or to clarify its meaning. Illustration is as old as writing, with both originating in the p...

soccer

(Encyclopedia)CE5 soccer, outdoor ball and goal game, also called association football or simply football. The first recorded game probably was that on a Shrove Tuesday in Derby, England, part of a festival to c...

color

(Encyclopedia)color, effect produced on the eye and its associated nerves by light waves of different wavelength or frequency. Light transmitted from an object to the eye stimulates the different color cones of the...