a. Marking an equality in the tides; having high tide at the same time. [ 1913 Webster ]
Cotidal lines (Phys. Geog.),
a. Of or pertaining to tides; caused by tides; having tides; periodically rising and falling, or following and ebbing;
The tidal wave of deeper souls
Into our inmost being rolls,
And lifts us unawares
Out of all meaner cares. Longfellow. [ 1913 Webster ]
Tidal air (Physiol.),
Tidal basin,
Tidal wave.
n.