| Word | Definitions | Synonyms |
|---|---|---|
| idocrase | (noun) a green or yellow or brown mineral consisting of a hydrated silicate; it occurs as crystals in limestone and is used a gemstone | Synonyms: vesuvian, vesuvianite |
| iridocyclitis | (noun) inflammation of the iris and ciliary body of the eye | - |
| lepidocrocite | (noun) a red to reddish brown mineral consisting of iron oxide hydroxide; often found in iron ores together with goethite | - |