Definition of biconcave in English:
 biconcave
adjectivebʌɪˈkɒnkeɪvbaɪˈkɑŋkeɪv
Concave on both sides.
 Example sentencesExamples
-  Ribs are straight or slightly biconcave and fade on the ventral surface where they merge into the lateral keel.
 -  The seventh cervical vertebra is biconcave and is well preserved.
 -  Genetic defects of the red cell membrane may cause the red cells to assume a spherical rather than a biconcave shape, or alter their configuration to an elliptical form.
 -  This was not an artifact, as those erythrocytes fixed within the blood vessels retained a normal biconcave shape.
 -  Under high power unstained red blood cells appear as pale, homogeneous, biconcave discs with no nucleus.
 
  Definition of biconcave in US English:
 biconcave
adjectivebīˈkäNGkāvbaɪˈkɑŋkeɪv
Concave on both sides.
 Example sentencesExamples
-  The seventh cervical vertebra is biconcave and is well preserved.
 -  This was not an artifact, as those erythrocytes fixed within the blood vessels retained a normal biconcave shape.
 -  Under high power unstained red blood cells appear as pale, homogeneous, biconcave discs with no nucleus.
 -  Genetic defects of the red cell membrane may cause the red cells to assume a spherical rather than a biconcave shape, or alter their configuration to an elliptical form.
 -  Ribs are straight or slightly biconcave and fade on the ventral surface where they merge into the lateral keel.