a. 空隙的, 裂缝的, 有空隙的

[医] 间隙的, 间质的

[ adj ]
of or relating to interstices
<adj.pert>

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.