Encyclopedias, Almanacs, Transcripts, and Maps
- Heliocentric Theory
- Hellawes
- Hellenbach, Baron Lazar De Baczolay(1827-1887)
- Hellström, Eva Backström (1898-?)
- Helmut Hasse
- Helvetius, John Friedrich (1625-1709)
- Hemagglutinin (HA) and Neuraminidase(NA)
- Hemianopsia
- Hemichordates: Hemichordata
- Hemifacial Microsomia
- Hemifacial Spasm
- Hemihypertrophy (Hemihyperplasia)
- Hemihypertrophy (Hemihyperplasia)
- Hemochromatosis
- Hemochromatosis
- Hemolytic-uremic syndrome
- Hemolytic-Uremic Syndrome
- Hemorrhoids
- Hendrik Anthony Kramers
- Hendrik W. Lenstra, Jr