Fr.: milieu internuage
A medium in which several molecular clouds are situated.
warm intercloud medium
madim-e andarabri-ye garm
Fr.: milieu internuage chaud
A component of the → interstellar medium consisting of an extremely tenuous (density 0.1 to 10 cm-3) and relatively warm gas (temperature about 8,000 K) filling the space between denser neutral and ionized gas. Hydrogen is partly ionized, partly atomic and observed by the → 21-centimeter line in emission.