froth

Froth is the gathering of small bubbles at the top of a drink, like the fizzy froth on the top of your root beer float.

There's usually froth on the surface of soda, beer, and even coffee drinks like cappuccinos and lattes, which are topped with milk froth. You can use the word froth as a verb as well, to mean "fizz or foam up." Liquid soap might froth in your hands as you wash them, for example, and making candy sometimes involves cooking sugar syrup until it starts to froth. The word most likely comes from an Old Norse root, froða, or "froth."

Definitions of froth
  1. noun
    a mass of small bubbles formed in or on a liquid
    synonyms: foam
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    types:
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    shaving foam
    toiletry consisting of a liquid preparation containing many small bubbles that soften the beard before shaving
    head
    the foam or froth that accumulates at the top when you pour an effervescent liquid into a container
    lather
    the foam resulting from excessive sweating (as on a horse)
    lather, soapsuds, suds
    the froth produced by soaps or detergents
    spume
    foam or froth on the sea
    white water, whitewater
    frothy water as in rapids or waterfalls
    shaving cream, shaving soap
    toiletry consisting of a preparation of soap and fatty acids that forms a rich lather for softening the beard before shaving
    type of:
    bubble
    a hollow globule of gas (e.g., air or carbon dioxide)
  2. verb
    become bubbly or frothy or foaming
    “The boiling soup was frothing
    synonyms: effervesce, fizz, foam, form bubbles, sparkle
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    types:
    lather
    form a lather
    seethe
    foam as if boiling
    type of:
    bubble
    form, produce, or emit bubbles
  3. verb
    exude or expel foam
    “the angry man was frothing at the mouth”
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    types:
    lather
    exude sweat or lather
    type of:
    exudate, exude, ooze, ooze out, transude
    release (a liquid) in drops or small quantities
  4. verb
    make froth or foam and become bubbly
    synonyms: spume, suds
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    type of:
    create, make
    make or cause to be or to become
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