interstitium

From Latin interstitium, from inter (“between”) + sistō (“to stand, place”).

• IPA^(key): /ˌɪntɚˈstɪʃi.əm/

interstitium (plural interstitia)

1. (medicine) An interstitial space within a tissue or organ.
2. (medicine) Specifically the tissue between the pulmonary alveoli and the bloodstream.
3. (philosophy) A state between systems or spaces.
4. An interstice, the interval of time required by the Roman Catholic Church between the attainment of different degrees of an order (pluralised as interstitia for the overall policy, which is also occasionally spelled instertitia).

• interstice
• interstitial
• interstition

From interstō.

• (Classical) IPA^(key): /in.terˈsti.ti.um/, [ɪn̪t̪ɛrˈs̠t̪ɪt̪iʊ̃ˑ]
• (modern Italianate Ecclesiastical) IPA^(key): /in.terˈstit.t͡si.um/, [in̪t̪erˈst̪it̪ː͡s̪ium]

interstitium n (genitive interstitiī or interstitī); second declension

1. gap, interval
2. interstice

Second-declension noun (neuter).

¹Found in older Latin (until the Augustan Age).

• “interstitium”, in Charlton T. Lewis and Charles Short (1879) A Latin Dictionary, Oxford: Clarendon Press
• interstitium in Gaffiot, Félix (1934) Dictionnaire illustré latin-français, Hachette.
• interstitium in Ramminger, Johann (2016 July 16 (last accessed)) Neulateinische Wortliste: Ein Wörterbuch des Lateinischen von Petrarca bis 1700‎, pre-publication website, 2005-2016