1. Between or among stars
   "the density of hydrogen in interplanetary and interstellar space"

See also: star

Encyclopedia: Interstellar

• test instrument vehicle
• test match
• test paper
• test period
• test pilot
• test range
• test rocket
• test room
• test suit
• test tube
• test-tube baby
• testa
• testable
• Testacea
• testacean
• testaceous
• testacy
• testament
• testamentary
• testamentary trust
• testamur
• testate
• testator
• testatrix
• testcross