1. Pertaining to or containing interstices.

2. Lying between.

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• interstital,
• intersitial,
• intersticial,
• interstinal,
• interstial,
• interstitual,
• unterstitial,
• jnterstitial,
• knterstitial,
• onterstitial,
• 9nterstitial,
• 8nterstitial,
• ibterstitial,
• imterstitial,
• ijterstitial,
• interstitian,
• intersteral,
• interstiton,
• Interviteal,
• intertibiall

• intermingle,
• interfacial,
• intestinal,
• intersexual,
• interspersal,
• intersection,
• interestingly,
• internationally,
• intervention,
• intermixture,
• interstellar,
• intertidal,
• interpreting,
• intersecting,
• interdict,
• intersect,
• interspersion,
• internationale,
• inter alia,
• interesting,
• intertribal,
• intervertebral,
• interstratify,
• interception,
• interspecies,
• interactional,
• intersperse,
• interruption,
• internet site,
• international,
• interracially,
• intercostal,
• interpretive,
• interstate,
• interstice,
• intermittently,
• interdiction,
• interjection,
• intercourse,
• internist,
• intermittent,
• interschool,
• interlingua,
• intermural,
• interracial,
• interested,
• intercession,
• interlineal.

The adjective form of the word "interstitial" is "interstitial".

The plural form of the word "interstitial" is "interstices"

The singular form of the word "interstitial" is "interstitium".