Adjective
Marking an equality in the tides; having high tide at the same time.
Source: Webster's dictionarySouth of Cape Hatteras the tidal forces are more complex, and cannot be predicted reliably based on the North Atlantic cotidal lines. Source: Internet
Amplitude is indicated by color, and the white lines are cotidal differing by 1 hour. Source: Internet
High water is reached simultaneously along the cotidal lines extending from the coast out into the ocean, and cotidal lines (and hence tidal phases) advance along the coast. Source: Internet
Lines of constant tidal phase are called cotidal lines, which are analogous to contour lines of constant altitude on topographical maps. Source: Internet
The amphidromic point is at once cotidal with high and low waters, which is satisfied by zero tidal motion. Source: Internet
The difference of cotidal phase from the phase of a reference tide is the epoch. Source: Internet