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.

A table giving the time of when the tide will be high or low at a particular place.

The tide which occurs when the moon is new or full; the effects of the Sun and moon being reinforced so that this tide is of maximum range.

The tide which occurs just after the first and third quarters of the moon, when there is least difference between high tide and low tide.