[医] 重波前的

Predicrotic \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.