Cō-tid'al, a.
a. [co, for con, and tidal, q. v.] Marking or indicating an equality in the tides.
Co-tidal lines (Phys. Geog.), lines on a map passing through places that have high tide at the same time. Whewell.
a. [co, for con, and tidal, q. v.] Marking or indicating an equality in the tides.
Co-tidal lines (Phys. Geog.), lines on a map passing through places that have high tide at the same time. Whewell.