conduction

Concise Oxford English Dictionary © 2008 Oxford University Press:
conduction/kənˈdʌkʃn/

▶noun

• 1 the transmission of heat through a medium from a region of higher temperature to a region of lower temperature.

• 2 the transmission of electricity or sound through a medium.

• 3 the conveying of fluid through a channel.

– derivatives
conductive adjective,
conductively adverb.