◙ noun 1. [mass noun] the action or process of flowing or flowing out • 流，涌流；流出 »the flux of men and women moving back and forth. 来来往往的男男女女。 »[count noun] a localized flux of calcium into the cell. 进入细胞的局限性钙流。 [count noun] [Medicine] an abnormal discharge of blood or other matter from or within the body • [医] （血等）流出，溢出 [一般作 the flux] (archaic)diarrhoea or dysentery • [古] 腹泻；痢疾 2. continuous change • 不断变化，波动 »the whole political system is in a state of flux. 整个政治体制飘忽不定。 3. [Physics] the rate of flow of a fluid, radiant energy, or particles across a given area • [物理] 通量，能流 the amount of radiation or particles incident on an area in a given time • 辐射（或粒子）通量 the total electric or magnetic field passing through a surface • 电通量；磁通量 4. a substance mixed with a solid to lower its melting point, used especially in soldering and brazing metals or to promote vitrification in glass or ceramics • 熔剂，焊剂 a substance added to a furnace during metal smelting or glass-making which combines with impurities to form slag • 造渣 ◙ verb 1. [with obj.] treat (a metal object) with a flux to promote melting • 用焊（或熔）剂处理
【语源】
1. late Middle English: from Latin fluxus, from fluere 'to flow'