Douglas Harper's Etymology Dictionary
Usage examples of "flood-tide".
On either side, to right and left the tree-girdle reached out toward the blue distance, thick close and unsundered, save where it and the plain which it begirdled was cleft amidmost by a river about as wide as the Thames at Sheene when the flood-tide is at its highest, but so swift and full of eddies, that it gave token of mountains not so far distant, though they were hidden.
On either side, to right and left the tree-girdle reached out toward the blue distance, thick close and unsundered, save where it and the plain which it begirdled was cleft amidmost by a river about as wide as the Thames at Sheene when the flood-tide is at its highest, but so swift and full of eddies, that it gave token of mountains not so far distant, though they were hidden.
When the boats left the Bell Rock to-day it was overflowed by the flood tide, but the floating light did not swing round to the flood-tide for more than an hour afterwards.