Encyclopedias, Almanacs, Transcripts, and Maps
- calico cat
- California Coastal National Monument
- California National Historic Trail
- California poppy
- California State University System
- California, Gulf of
- California, Lower
- calisthenics
- Calixtines
- Calixtus, Georgius
- calla
- Callao
- Calleja del Rey, Félix María
- Callinus
- calliopsis
- Callirrhoë
- Callirrhoë
- Callisthenes
- Callistratus
- Callistus