equatorial trough

equatorial trough

[‚e·kwə′tȯr·ē·əl ′trȯf]
(meteorology)
The quasicontinuous belt of low pressure lying between the subtropical high-pressure belts of the Northern and Southern hemispheres. Also known as meteorological equator.
References in periodicals archive ?
1828 Equatorial Trough (Doldrums) explained (von Humboldt)
Vesta also bears multiple scars from two giant impacts, including mammoth basins in its south pole and equatorial troughs that formed as the rocky crust reverberated from the impact.