1) Geology: The process of transport of a quantity by the velocity
field due to the movement of a fluid. Advection differs from
→ convection, which describes thermally driven
From L. advecti "act of conveying," from advectus, past participle of advehere "to carry," from ad-, "to" + vehere "to carry, bring;" Skt. vah-, vahati "to carry, conduct, guide," Av. vaz-, vazaiti "to guide, lead"; PIE *wegh- "to go, transport in a vehicle".
Fr.: terme d'advection
The first term on the right side in the → induction equation.
Fr.: advection magnétique
The transport of the magnetic field by a fluid. It is given by the term ∇ x (v x B) in the → induction equation.