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condensation

(Encyclopedia)condensation, in physics, change of a substance from the gaseous (vapor) to the liquid state (see states of matter). Condensation is the reverse of vaporization, or change from liquid to gas. It can b...

Paxton, Sir Joseph

(Encyclopedia)Paxton, Sir Joseph, 1803–65, English architect, noted for his use of glass and iron in a proto-modern manner. Beginning his career as a gardener and estate manager, he then built two greenhouses at ...

clairvoyance

(Encyclopedia)clairvoyance klârˌvoiˈəns [key], alleged power to perceive, as though visually, objects or persons not discernible through the ordinary sense channels. Clairvoyance may occur in a supposedly norma...

coagulation

(Encyclopedia)coagulation kōăgˌyo͞olāˈshən [key], the collecting into a mass of minute particles of a solid dispersed throughout a liquid (a sol), usually followed by the precipitation or separation of the s...

solvent

(Encyclopedia)solvent, constituent of a solution that acts as a dissolving agent. In solutions of solids or gases in a liquid, the liquid is the solvent. In all other solutions (i.e., liquids in liquids or solids i...

chemical bond

(Encyclopedia)chemical bond, mechanism whereby atoms combine to form molecules. There is a chemical bond between two atoms or groups of atoms when the forces acting between them are strong enough to lead to the for...

thermometer

(Encyclopedia)thermometer, instrument for measuring temperature. Galileo and Sanctorius devised thermometers consisting essentially of a bulb with a tubular projection, the open end of which was immersed in a liqui...

phase diagram

(Encyclopedia)CE5 Phase diagram for a substance, like water, which expands on freezing phase diagram, graph that shows the relation between the solid, liquid, and gaseous states of a substance (see states of ma...

Le Châtelier's principle

(Encyclopedia)Le Châtelier's principle, chemical principle that states that if a system in equilibrium is disturbed by changes in determining factors, such as temperature, pressure, and concentration of components...

diode

(Encyclopedia)diode dīˈōd [key], two-terminal electronic device that permits current flow predominantly in only one direction. Most diodes are semiconductor devices; diode electron tubes are now used only for a ...