Etymology: From Middle English Middle English, agger "heap", "pile", from Latin, agger "rubble", "mound", "rampart", from ad-Latin, ad- + gerere, to carry, to bring
- A high tide in which the water rises to a given level, recedes, and then rises again.
- A low tide in which the water recedes to a given level, rises, and then recedes again.
- In ancient Roman building, an earthwork; a mound; a raised work.
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