trade wind
noun
- a wind blowing steadily towards the equator from the north-east in the northern hemisphere or the south-east in the southern hemisphere, especially at sea. Two belts of trade winds encircle the earth, blowing from the tropical high-pressure belts to the low-pressure zone at the equator.信风, 贸易风。
词源
mid 17th cent.: from the phrase blow trade 'blow steadily in the same direction'. Because of the importance of these winds to navigation， 18th-cent. etymologists were led erroneously to connect the word trade with 'commerce'.