sub·son·ic 
(sŭb-sŏnĭk)
(sŭb-sŏnĭk)adj.
1. Of less than audible frequency.
2. Having a speed less than that of sound in a designated medium.
- paleoanthropology
- paleobiogeographic
- paleobiogeographical
- paleobiogeography
- paleobiologic
- paleobiological
- paleobiologically
- paleobiologist
- paleobiology
- paleobotanic
- paleobotanical
- paleobotanically
- paleobotanist
- paleobotany
- Paleocene
- paleoclimatologist
- paleoclimatology
- paleoconservative
- paleoecologic
- paleoecological
- paleoecologist
- paleoecology
- Paleogene
- paleogeneticist
- paleogenetics