vorticity

詳細解釋：

vor.tic.i.ty

n.（名詞）
pl. vor.tic.i.ties
Physics A measure of the rate of rotational spin in a fluid.
【物理學】 渦旋測量：測量渦輪在液體中的旋轉率
Meteorology A measure of the spin of an air mass such as a low- or high-pressure weather system.
【氣象學】 氣壓渦度測量：測量氣團如高低壓氣象系統的旋轉