■ plural noun a belt of calm air and sea occurring in both the northern and southern hemispheres between the trade winds and the westerlies.
Origin
C18: of uncertain origin.
■ plural noun a belt of calm air and sea occurring in both the northern and southern hemispheres between the trade winds and the westerlies.
Origin
C18: of uncertain origin.
Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004