Multicomponent material comprising multiple, different (non-gaseous) phase domains
in which at
least one type of phase domain
is a continuous phase.
A foamed substance, which is a multiphase material that consists of a gas dispersed
in a liquid or solid,
is not normally considered to be a composite.
PAC, 2007, 79, 1801
(Definitions of terms relating to the structure and processing of sols, gels, networks,
and inorganic-organic hybrid materials (IUPAC Recommendations 2007))
on page 1810