interstitial

 
Pronunciation: /ˌɪntəˈstɪʃ(ə)l/

adjective

  • of, forming, or occupying interstices: the interstitial space
  • Ecology (of minute animals) living in the spaces between individual sand grains in the soil or aquatic sediments: interstitial fauna

noun

Computing
  • an advertisement that appears while a chosen website or page is downloading.

Derivatives

interstitially

adverb