Encyclopedias, Almanacs, Transcripts, and Maps
- Pendred Syndrome
- Penduline Titmice: Remizidae
- Pendulums
- Penelhum, Terence Michael (1929-)
- Penguins: Sphenisciformes
- Peninsula
- Peninsula
- Penninger, Josef Martin (1964- )
- Pentecost Miracles (with D. D. Home)
- Pentyl Group
- Pentyl Group
- Pepper, May S. (1868-?)
- Peptide Linkage
- Peptide Linkage
- Per Lindstrand
- Perches, Basses, and Relatives: Perciformes
- Perches, Darters, and Relatives: Percoidei
- Perching Birds: Passeriformes
- Percipient
- Percival, Harold Waldwin (1868-1953)