trade wind

trade wind

noun

: a wind that blows almost constantly to the west and towards the equator

Full Definition of TRADE WIND

:  a wind blowing almost constantly in one direction; especially :  a wind blowing almost continually toward the equator from the northeast in the belt between the northern horse latitudes and the doldrums and from the southeast in the belt between the southern horse latitudes and the doldrums —usually used in plural

First Known Use of TRADE WIND

1650