An Etymological Dictionary of Astronomy and Astrophysics

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 circulation.
   

2. Meteorology: The predominantly horizontal, large-scale motions of the atmosphere. In contrast, convection describes the predominantly vertical, locally induced motions.

Etymology (EN): 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”.

Etymology (PE): Pahnbaz from pahn “flat, wide, → broad,”

• baz “to carry,” → evection.