marl·stone 
(märlstōn′)
(märlstōn′)n.
A rock containing clay materials and calcium and magnesium carbonates, with approximately the same composition as marl.
- independent variable
- in-depth
- Inderal
- indescribability
- indescribable
- indescribableness
- indescribably
- indestructibility
- indestructible
- indestructibleness
- indestructibly
- in detail
- indeterminable
- indeterminably
- indeterminacy
- indeterminate
- indeterminately
- indeterminateness
- indetermination
- indeterminism
- indeterminist
- indeterministic
- index
- indexation
- index case