a collection of minute bubbles formed on the surface of a liquid by agitation, fermentation, etc.:
foam on a glass of beer.
the froth of perspiration, caused by great exertion, formed on the skin of a horse or other animal.
froth formed from saliva in the mouth, as in epilepsy and rabies.
a thick frothy substance, as shaving cream.
a dispersion of gas bubbles in a solid, as foam glass, foam rubber, polyfoam, or foamed metal.
Literary. the sea.
verb (used without object)
to form or gather foam; emit foam; froth.
verb (used with object)
to cause to foam.
to cover with foam; apply foam to:
to foam a runway before an emergency landing.
to insulate with foam.
to make (plastic, metal, etc.) into a foam.
foam at the mouth, to be extremely or uncontrollably angry.
a mass of small bubbles of gas formed on the surface of a liquid, such as the froth produced by agitating a solution of soap or detergent in water
frothy saliva sometimes formed in and expelled from the mouth, as in rabies
the frothy sweat of a horse or similar animal
a colloid consisting of a gas suspended in a liquid
a mixture of chemicals sprayed from a fire extinguisher onto a burning substance to create a stable layer of bubbles which smothers the flames
a poetic word for the sea
to produce or cause to produce foam; froth
(intransitive) to be very angry (esp in the phrase foam at the mouth)
Old English fam “foam, saliva froth,” from West Germanic *faimo- (cf. Old High German veim, German Feim), from PIE *(s)poi-mo-, a root with connotations of “foam, froth” (cf. Sanskrit phenah; Latin pumex “pumice,” spuma “foam;” Old Church Slavonic pena “foam;” Lithuanian spaine “a streak of foam”). The rubber or plastic variety so called from 1937.
Old English famgian “to foam,” from the source of foam (n.). Related: Foamed; foaming.
(Hos. 10:7), the rendering of _ketseph_, which properly means twigs or splinters (as rendered in the LXX. and marg. R.V.). The expression in Hosea may therefore be read, “as a chip on the face of the water,” denoting the helplessness of the piece of wood as compared with the irresistable current.
- Foam cell
foam cell n. A cell containing lipids in small vacuoles, as seen in leprosy and xanthoma, often a histiocyte.
noun, Chemistry, Metallurgy. 1. a uniform foamlike metal structure produced when hydrogen bubbles are evolved from metal hydrides uniformly dispersed throughout a host metal or metal alloy: used as a structural material because of its shock-absorbing properties and light weight.
noun 1. .