interclump

Etymology
From.

Adjective

 * 1) Between clumps
 * 2) * 2012 Paul P. van der Werf et al, "Tearing the Veil: interaction of the Orion Nebula with its neutral environment" arXiv
 * The gas temperature in this region is approximately 540K, and the HI abundance in the interclump gas in the PDR is 5-10% of the available hydrogen nuclei.