Dictionaries, Thesauruses, Pictures, and Press Releases
- Jacobson's organ
- Jacob–Monod hypothesis
- Jacquet, Pierre Armand
- Jacquin, Nikolaus Josef
- Jaeger, Frans Maurits
- Jaeger, Georg Friedrich
- Jaekel, Otto
- Jaggar, Thomas Augustus, Jr.
- Jaghmini, Sharaf Al-Din Mahmud Ibn Muh?ammad Ibn ’Umar Al
- Jahn, Hans Max
- jak
- James of Venice also known as Iacobus Veneticus Grecus
- jamesonite
- Janiszewski, Zygmunt
- Janjukian
- Jansen, Zacharias
- Janssen, Paul Adriaan Jan
- Japan Trench
- Japan Trench
- Japan-type margin