- interstellar scintillation
- interstellar space
- interstellar stream
- interstellar wind
- interstice
- interstice occupation factor
- interstice occupation factor (SOF)
- interstitial
- interstitial ads
- interstitial alloy
- interstitial atom
- interstitial brachytherapy
- interstitial cell
- interstitial cell-stimulating hormone
- interstitial chiasma
- interstitial compound
- interstitialcy
- interstitial defect
- interstitial deletion
- interstitial diffusion
- interstitial gland
- interstitial growth
- interstitial impurity
- interstitial lung disease
- interstitial phase of superalloy