from The Century Dictionary.
- noun A lock situated between the tide-water of a harbor or river and an inclosed basin when their levels vary.
Sorry, no etymologies found.
III. (chap. cii.), and the works were commenced, in the beginning of 1804, by the formation of a dock or basin adjoining the intended tide-lock at Corpach, near Bannavie.
The St. Katherine Docks communicate with the river by means of an entrance tide-lock, 180 feet long and 45 feet wide, with three pairs of gates, admitting either one very large or two small vessels at a time.