Encyclopedias, Almanacs, Transcripts, and Maps
- Hernia
- Herons
- Herons
- Herons and Bitterns: Ardeidae
- Herophilus of Chalcedon
- Herpes and Herpes Virus
- Herrings
- Herrings
- Herrings: Clupeiformes
- Herschel, William James
- Hertha Marks Ayrton
- Hertha Marks Ayrton
- Hesitation Wounds
- Heterotrophic Bacteria
- Hettinger, J(ohn)
- Hexenhaus
- Heyd
- Heydon, John (1629-ca. 1668)
- Heym, Gerard (d. ca. 1974)
- Heymans, Gerardus (1857-1930)