mean diurnal high-water inequality

mean diurnal high-water inequality

[′mēn dī′ərn·əl ′hī ‚wȯd·ər ‚in·i′kwäl·əd·ē]
(oceanography)
Half the average difference between the heights of the two high waters of each tidal day over a 19-year period; it is obtained by subtracting the mean of all high waters from the mean of the higher high waters.