Physical sciences

• Interstitial defect
  Interstitial defect
  Interstitials are a variety of crystallographic defects, i.e. atoms which occupy a site in the crystal structure at which there is usually not an atom, or two or more atoms sharing one or more lattice sites such that the number of atoms is larger than the number of lattice sites.They are generally...
  
  , a crystallographic defect, atom(s) outside regular crystal lattice sites
• Interstitial element
• Interstitial compound
  Interstitial compound
  An interstitial compound or interstitial alloy is a compound that is formed when an atom of sufficiently small radius sits in an interstitial “hole” in a metal lattice. Examples of small atoms are hydrogen, boron, carbon and nitrogen...
  
  , a compound formed by small atoms occupying empty space in a metal lattice

Advertising

• Interstitial webpage
  Interstitial webpage
  On the World Wide Web, interstitials are web pages displayed before or after an expected content page, often to display advertisements or confirm the user's age. Most interstitial advertisements are delivered by an Ad server....
  
  , displayed before or after an expected content page, often to display advertisements or confirm the user's age

Biology

• Interstitial space
• Interstitial cell
  Interstitial cell
  Interstitial cell refers to any one of a number of different types of cells characterized by their interstitial nature Examples include:...
  
  , various
• Interstitial collagenase, enzyme that breaks the peptide bonds in collagen
• Interstitial fluid
  Interstitial fluid
  Interstitial fluid is a solution that bathes and surrounds the cells of multicellular animals. It is the main component of the extracellular fluid, which also includes plasma and transcellular fluid...
  
  , a solution that bathes and surrounds the cells of multicellular animals

Diseases

• Interstitial cell tumor
• Interstitial cystitis
  Interstitial cystitis
  Interstitial cystitis or bladder pain syndrome is a chronic, oftentimes severely debilitating disease of the urinary bladder...
  
  
• Interstitial granulomatous dermatitis
  Interstitial granulomatous dermatitis
  Interstitial granulomatous dermatitis with arthritis is a condition that most commonly presents with symmetrical round-to-oval erythematous or violaceous plaques on the flanks, axillae, inner thighs, and lower abdomen....
  
  
• Interstitial lung disease
• Interstitial nephritis
  Interstitial nephritis
  Interstitial nephritis is a form of nephritis affecting the interstitium of the kidneys surrounding the tubules...
  
  

Arts

• Interstitial art
  Interstitial art
  Interstitial art is a term first coined in the 1990s, and increasingly popularized in the early 2000s, that refers to any work of art whose basic nature falls between, rather than within, the familiar boundaries of accepted genres or media, thus making the work difficult to easily categorize or...
  
  , any work of art whose basic nature falls between, rather than within, the familiar boundaries of accepted genres or media
• Interstitial space (architecture)

Communications

• Interstitial program
  Interstitial program
  In television programming, an interstitial program refers to a short program which is often shown between movies or other events, e.g. a cast interview after movies on premium channels...
  
  , short television programming which is often shown between movies or other events
• A synonym for station identification
  Station identification
  Station identification is the practice of radio or television stations or networks identifying themselves on air, typically by means of a call sign or brand name...
  
   in television broadcasting, typically a static logo
• Interstitial webpage
  Interstitial webpage
  On the World Wide Web, interstitials are web pages displayed before or after an expected content page, often to display advertisements or confirm the user's age. Most interstitial advertisements are delivered by an Ad server....
  
  , a web page that is displayed before an expected content page, often to display advertisements or confirm the user's age

Religion

• A waiting period, in the canon law
  Canon law
  Canon law is the body of laws & regulations made or adopted by ecclesiastical authority, for the government of the Christian organization and its members. It is the internal ecclesiastical law governing the Catholic Church , the Eastern and Oriental Orthodox churches, and the Anglican Communion of...
  
   of the Catholic church, a period of three months is normally required between being ordained
  Holy Orders
  The term Holy Orders is used by many Christian churches to refer to ordination or to those individuals ordained for a special role or ministry....
  
   a deacon
  Deacon
  Deacon is a ministry in the Christian Church that is generally associated with service of some kind, but which varies among theological and denominational traditions...
  
   and being ordained a priest
  Priest
  A priest is a person authorized to perform the sacred rites of a religion, especially as a mediatory agent between humans and deities. They also have the authority or power to administer religious rites; in particular, rites of sacrifice to, and propitiation of, a deity or deities...
  
  

Law

• "Interstital federal lawmaking" is a species of "federal common law" which arises where Congressional statutes implicitly compel federal courts to fill gaps to interpret the federal law, should a case or controversy arise, where the transactions or issues typically would be controlled by state law (such as real property regulatory programs). United States v. Little Lake Misere Land Co., 412 U.S. 580 (1973).