|1.||of or relating to an interstice or interstices|
|2.||physics forming or occurring in an interstice: an interstitial atom|
|3.||chem containing interstitial atoms or ions: an interstitial compound|
|4.||anatomy, zoology occurring in the spaces between organs, tissues, etc: interstitial cells|
|5.||chem an atom or ion situated in the interstices of a crystal lattice|
interstitial in·ter·sti·tial (ĭn'tər-stĭsh'əl)
Relating to or situated in the small, narrow spaces between tissues or parts of an organ.