calvaria UK /kælˈvɛəɹi.ə/US /kælˈvɛɹi.ə/ noun1 •The dome or roof of the skull, the skullcap.CD105 Thy1- progenitor populations derived from regions of the fetal mandible or calvaria that do not undergo endochondral ossification formed only bone without marrow in our assay. — 2008 formscalvariae · calvarias