Retard , ∨ Age , of the tide Meaning, Definition & Usage

Definitions
  1. the interval between the transit of the moon at which a tide originates and the appearance of the tide itself. It is found, in general, that any particular tide is not principally due to the moon's transit immediatelly proceeding, but to a transit which has occured some time before, and which is said to correspond to it. The retard of the tide is thus distinguished from the lunitidal interval. See under Retardation. rHam. Nav. Encyc.

Webster 1913