| Iamatology |
Study of remedies |
| Iatrology |
Treatise or text on medical topics; study of medicine |
| Iatromathematics |
Archaic practice of medicine in conjunction with astrology |
| Ichnography |
Art of drawing ground plans; a ground plan |
| Ichnology |
Science of fossilized footprints |
| Ichthyology |
Study of fish |
| Iconography |
Study of drawing symbols |
| Iconology |
Study of icons; symbols |
| Ideogeny |
Study of origins of ideas |
| Ideology |
Science of ideas; system of ideas used to justify behaviour |
| Idiomology |
Study of idiom, jargon or dialect |
| Idiopsychology |
Psychology of one's own mind |
| Immunogenetics |
Study of genetic characteristics of immunity |
| Immunology |
Study of immunity |
| Immunopathology |
Study of immunity to disease |
| Insectology |
Study of insects |
| Irenology |
The study of peace |
| Iridology |
Study of the iris; diagnosis of disease based on the iris of the eye |