Dictionaries, Thesauruses, Pictures, and Press Releases
- Kirkaldy, David
- Kirkfieldian
- Kirkman, Thomas Penyngton
- Kirkwood, John Gamble
- Kirtland's warbler
- Kirwan, Richard
- Kitaibel, Pál (Or Paul)
- Kitti's bat
- Kjeldahl, Johann Gustav Christoffer
- Kl?gel, Georg Simon
- Klazminskian
- Klebs, Georg Albrecht
- Klebsiella
- Klein, Harold P.
- Klein, Hermann Joseph
- Klein, Jacob Theodor
- Klein, Oskar Benjamin
- Kleinenberg, Nicolaus (Nicolai)
- Kleist, Ewald Georg von
- Klenk, Ernst