the variable voltage in the positive deflection of the electroretinogram (β-wave) of the dark-adapted eye arising from amacrine cells.
os·cil·la·to·ry po·ten·tial
(os'i-lă-tōr-ē pŏ-ten'shăl) The variable voltage in the positive deflection of the electroretinogram (B-wave) of the dark-adapted eye arising from amacrine cells.