'Biconcave' definitions:

Definition of 'biconcave'

From: WordNet
adjective
Concave on both sides [syn: biconcave, concavo- concave]

Definition of 'Biconcave'

From: GCIDE
  • Biconcave \Bi*con"cave\, a. [Pref. bi- + concave.] Concave on both sides; as, biconcave vertebr[ae]. [1913 Webster]