where water is
Not sure about this. In my experience waterline usually refers to where the water is now (eg, the waterline of a boat). The mark that shows where water has been is the (high) tide line, (high) water mark, etc. --User:Wiml
- Well, most of this contributor's entries are crap - oversimplistic at best. --User:22.214.171.124.
one or two words
Websters 1913 and my quick look at my American Hertiage (which, admittedly, shouldn't be trusted) show it as two words. --Stranger 03:24, 25 September 2005 (UTC)