conduction
[ kuh n-duhk-shuh n ]
/ kənˈdʌk ʃən /
noun
the act of conducting, as of water through a pipe.
Physics.
- the transfer of heat between two parts of a stationary system, caused by a temperature difference between the parts.
- transmission through a conductor.
- conductivity.
Physiology.
the carrying of sound waves, electrons, heat, or nerve impulses by a nerve or other tissue.
Origin of conduction
OTHER WORDS FROM conduction
con·duc·tion·al, adjective pre·con·duc·tion, nounWords nearby conduction
Example sentences from the Web for conduction
British Dictionary definitions for conduction
conduction
/ (kənˈdʌkʃən) /
noun
the transfer of energy by a medium without bulk movement of the medium itself
heat conduction,; electrical conduction,; sound conduction Compare convection (def. 1)
the transmission of an electrical or chemical impulse along a nerve fibre
the act of conveying or conducting, as through a pipe
physics another name for conductivity (def. 1)
Derived forms of conduction
conductional, adjectiveMedical definitions for conduction
conduction
[ kən-dŭk′shən ]
n.
The transmission or conveying of something through a medium or passage, especially the transmission of electric charge or heat through a conducting medium without perceptible motion of the medium itself.
Scientific definitions for conduction
conduction
[ kən-dŭk′shən ]
The transfer of energy, such as heat or an electric charge, through a substance. In heat conduction, energy is transferred from molecule to molecule by direct contact; the molecules themselves do not necessarily change position, but simply vibrate more or less quickly against each other. In electrical conduction, energy is transferred by the movement of electrons or ions. Compare convection. See also radiation.
A Closer Look
Heat is a form of energy that manifests itself in the motion of molecules and atoms, as well as subatomic particles. Heat energy can be transferred by conduction, convection, or radiation. In conduction heat spreads through a substance when faster atoms and molecules collide with neighboring slower ones, transferring some of their kinetic energy to them. This is how the handle of a teaspoon sticking out of a cup of hot tea eventually gets hot, though it is not in direct contact with the hot liquid. When a fluid is heated, portions of the fluid near the source of the heat tend to become less dense and expand outward, causing currents in the fluid. When these less dense regions rise, cooler portions flow in to take their place, which are then themselves subject to heating. This current flow is called convection. Many ocean currents are convection currents caused by the uneven heating of the ocean waters by the Sun. Radiation transmits heat in the form of electromagnetic waves, especially infrared waves, which have a lower frequency than visible light but a higher frequency than microwaves. Atoms and molecules in a substance struck by such radiation readily absorb the energy from these waves, thereby increasing their own kinetic energy and thus the temperature of the substance.
Cultural definitions for conduction
conduction
Transfer of energy through a medium (for example, heat or electricity through metal) without any apparent change in the medium.