'Interstitial' definitions:
Definition of 'interstitial'
(from WordNet)
adjective
Of or relating to interstices
Definition of 'Interstitial'
From: GCIDE
- Interstitial \In`ter*sti"tial\, a. Of or pertaining to interstices; intermediate; within the tissues; as, interstitial cavities or spaces in the tissues of animals or plants. [1913 Webster]