\Pre`di*crot"ic\, a. (Physiol.)
A term applied to the pulse wave sometimes seen in a pulse
curve or sphygmogram, between the apex of the curve and the
dicrotic wave.
      The predicrotic or tidal wave is best marked in a hard
      pulse, i. e., where the blood pressure is high.
                                               --Landois &
                                               Stirling.