mass noun
1- a mass of small bubbles formed on or in liquid, typically by agitation or fermentation泡沫：
a beer with a thick head of foam.
有厚厚一层泡沫的啤酒。
1.1
- a similar mass formed from saliva or sweat唾沫; 大汗, 汗沫。
1.2
- a liquid preparation containing many small bubbles有许多小泡沫的液体制剂：
shaving foam.
刮脸膏。
1.3
- a lightweight form of rubber or plastic made by solidifying such a liquid泡沫材料（橡胶、塑料等）：
as modifier foam rubber.泡沫橡胶。
1.4
the foam
poetic/literary the sea〈诗/文〉海：Venus rising from the foam.
从海上升起的维纳斯。
no obj.
1- form or produce a mass of small bubbles; froth起泡沫; 发泡：
the sea foamed beneath them.
海浪在他们脚下泛起泡沫。
1.1
- figurative, informal be very angry〈喻, 非正式〉大怒：
staff are foaming at the mouth.
职员们气得破口大骂。
派生词
foamless
adjectivefoamy
adjective词源
Old English fām (noun), fǣman (verb), of West Germanic origin; related to Old High German feim (noun), feimen (verb).