Dictionaries, Thesauruses, Pictures, and Press Releases
- Hasenöhrl, Friedrich
- Hasler, Arthur Davis
- Hasse, Helmut
- Hassenfratz, Jean-Henri
- Hassler, Ferdinand Rudolph
- Hastarian
- hastingsite
- Hatchett, Charles
- Hatch–Slack pathway
- Hatschek, Berthold
- Haug, Gustave Emile
- haulm
- Haumurian
- Haurwitz, Bernhard
- Hautefeuille, Paul Gabriel
- Hauterivian
- Haüy, Abbé René-Just
- Havers, Clopton
- Haversian canal
- Haversian canals