concavitas

From concavus (“hollow, concave”) +‎ -tās (“-ty”, abstract noun suffix).

• (Classical Latin) IPA^(key): /konˈka.u̯i.taːs/, [kɔŋˈkäu̯ɪt̪äːs̠]
• (modern Italianate Ecclesiastical) IPA^(key): /konˈka.vi.tas/, [koŋˈkäːvit̪äs]

concavitās f (genitive concavitātis); third declension (Late Latin)

1. hollow, cavity
   • c. 420 CE, Caelius Aurelianus, Tardae passiones 2.1.14

Third-declension noun.

• concavō (verb)
• cavus

• “concavitas”, in Charlton T. Lewis and Charles Short (1879) A Latin Dictionary, Oxford: Clarendon Press