| Term | Definition | Contributor | Modified |
|---|---|---|---|
| illuminance | No definition provided | Ryan McGranaghan | 2023.04.16 |
| Illuminati | No definition provided | Christopher Rauch | 2023.12.01 |
| Illuminating gas | No definition provided | Christopher Rauch | 2023.12.01 |
| Illumination | No definition provided | Christopher Rauch | 2023.12.01 |
| Illumination of books and manuscripts | No definition provided | Christopher Rauch | 2023.12.01 |
| Illumination of books and manuscripts--Bihl | No definition provided | Christopher Rauch | 2023.12.01 |
| Illusions | No definition provided | Christopher Rauch | 2023.12.01 |
| Illusions, Optical | No definition provided | Christopher Rauch | 2023.12.01 |
| Illustrated books | No definition provided | Christopher Rauch | 2023.12.01 |
| Illustrated books--15th and 16th centuries | No definition provided | Christopher Rauch | 2023.12.01 |
| Illustrated books--Almanacs | No definition provided | Christopher Rauch | 2023.12.01 |
| Illustrated books--Bibl | No definition provided | Christopher Rauch | 2023.12.01 |
| Illustrated books--Bibles | No definition provided | Christopher Rauch | 2023.12.01 |
| Illustrated books--Exhibitions | No definition provided | Christopher Rauch | 2023.12.01 |
| Illustrated books--Extra illustrated | No definition provided | Christopher Rauch | 2023.12.01 |
| Illustrated books--Missals | No definition provided | Christopher Rauch | 2023.12.01 |
| Illustration of books | No definition provided | Christopher Rauch | 2023.12.01 |
| Illustrations, Humorous | No definition provided | Christopher Rauch | 2023.12.01 |
| Illustrators | No definition provided | Christopher Rauch | 2023.12.01 |
| Illyrism | No definition provided | Christopher Rauch | 2023.12.01 |