tide hole

tide hole

[′tīd ‚hōl]
(oceanography)
A hole made in ice to observe the height of the tide.
References in periodicals archive ?
Teesside Corporation had decided to start a gramophone record lending service for an annual subscription of 30 shillings (pounds 1.50) Tide holes sea wall Workmen faced a race against time at Redcar in their attempts to seal up a huge gap with sandbags in the sea wall caused by an exceptionally high tide.