Relating to or designating points in the ocean that experience high tide at the same time; having equal tidal timing.
From 'co-' (together/equal) + 'tidal' (relating to tides), scientific terminology for synchronous tidal phenomena.
Cotidal lines on nautical maps show where the Moon pulls water simultaneously—they're invisible boundaries that ancient sailors navigated by intuition but we now map precisely.
Complete word intelligence in one call. Free tier — 50 lookups/day.