'Concavities' definitions:

Definition of 'Concavities'

From: GCIDE
  • Concavity \Con*cav"i*ty\, n.; pl. Concavities. [L. concavitas: cf. F. concavit['e]. See Concave.] A concave surface, or the space bounded by it; the state of being concave. [1913 Webster]