Dictionaries, Thesauruses, Pictures, and Press Releases
- jew's ear fungus
- jewel beetle
- jewel wasps
- Jewett, Frank Baldwin
- jezebels
- JGA
- jigger flea
- Joachimsthal, Ferdinand
- Job's tears
- Joblot, Louis
- Johannes Lauratius De Fundis
- Johannesteijsmannia
- Johannian
- Johannsen, Albert
- Johannsen, Wilhelm Ludvig
- John of Dumbleton
- John of Gmunden
- John of Lignéres, or Johannes de Lineriis
- John of Murs
- John of Palermo