Definition that contains primordia
- titan (Greek mythology) any of the primordial giant gods who ruled the Earth until overthrown by Zeus; the Titans were offspring of Uranus (Heaven) and Gaea (Earth)
- mesothelium epithelium originating in the embryonic mesoderm; lines the primordial body cavity
- titaness (Greek mythology) any of the primordial giant goddesses who were offspring of Uranus (heaven) and Gaea (earth) in ancient mythology