A body of water made rough by the conflict of opposing tides or currents.

A gauge for showing the height of the tide, particularly one continuously updated.

Pressure waves in the atmosphere similar to the tides of the ocean, produced by the gravitational influence of the moon and by thermal expansion and contraction.

The interval between consecutive high tides at a given place.

A sundial marking canonical hours. / An elliptical plate marking the state of the ocean tides.

An opening through which water may flow freely when the tide moves in one direction, but which closes automatically and prevents the water from flowing in the other direction.

(UK, historical) A customs inspector at a seaport who oversees the landing of goods from merchant vessels in order to secure payment of duties.

A water wheel operated by the ebb and flow of the tide.

A lock situated between an enclosed basin or a canal and the tide water of a harbor or river, when they are on different levels, so that craft can pass either way at all times of the tide

A mill operated by tidal currents. / A mill for clearing lands of tide water.