from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. An interstitial space within a tissue or organ.
- n. Specifically the tissue between the pulmonary alveoli and the bloodstream.
- n. A state between systems or spaces.
from The Century Dictionary and Cyclopedia
- n. In church arch., the place where the transept meets the nave and choir, this space often being covered by a tower or cupola; the cross.
From Latin interstitium, from inter ("between") + sistere ("to stand, place"). (Wiktionary)