from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A sea channel characterized by turbulent and unpredictable currents.
from the GNU version of the Collaborative International Dictionary of English
- n. A strait; a narrow tract of water, where the tide, or a current, flows and reflows with violence, as the ancient frith of this name between Eubœa and Bœotia. Hence, a flux and reflux.
from The Century Dictionary and Cyclopedia
- n. A strait or narrow sea where the flow of the tide in both directions is violent, as in the strait between the island of Eubœa and Bœotia in Greece, specifically called Euripus.
"euripus" is perhaps best left to the imagination.
A good part of this was taken up by the spina, or middle space, adorned with temples, statues, and two great obelisks; as well as by the euripus, or canal, made by order of Julius Caesar, to contain crocodiles, and other aquatic animals, which were killed occasionally.
This last detail proves that when the rough altar of Volesus Sabinus was succeeded by the later noble structure, the pool was drained, and its feeding springs were led into the _euripus_, so that the patients seeking a cure for their ailments could bathe in or drink the miracle-working waters with greater ease.
The drawings which illustrate my account of the discovery  prove that the altar rose from a platform twelve feet square, approached on all sides by three or four marble steps, that platform and altar were enclosed by three lines of wall at an interval of thirty-six feet from one another, and that on the east side of the square ran a _euripus_, or channel, eleven feet wide, and four feet deep, lined with stone blocks, the incline of which towards the Tiber is about 1: 100.