a. [f. L. lūna moon + TIDAL.] Pertaining to the movements of the tide dependent on the moon. Lunitidal interval (see quot.).
1851–9. Whewell, in Man. Sci. Enq., 70. We add to them the other columns containing the moon’s transit and the lunitidal interval calculated therefrom.
1889. Sir R. Ball, Time & Tide, 30. We speak of the interval between the transit of the moon and the time of high water as the luni-tidal interval.
