Iceland crystal
now historical
noun
= Iceland spar.
- .
Origin
Late 17th century.
- irredeemability
- irredeemable
- irredeemably
- irredentism
- irredentist
- irreducibility
- irreducible
- irreducibly
- irreflexive
- irreformable
- irrefragable
- irrefragably
- irrefrangible
- irrefutability
- irrefutable
- irrefutably
- irreg.
- irregardless
- irregular
- irregularity
- irregularly
- irregular verb
- irrelative
- irrelatively
- irrelevance