【医】 cavum protovertebrae
former; original
【化】 ortho-
【医】 arch-; arche-; ortho-; pro-; prot-; proto-
vertebra
antrum; cavity
【医】 cava; cavern; caverna; cavitas; cavitat; cavity; cavum; celio-; chamber
coel-; coelio-; lumen; lumina; space; spatia; spatium