from The Century Dictionary.
- noun The presence of lactose in the urine.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- noun presence of lactose in the urine; can occur during pregnancy or lactation
Sorry, no etymologies found.
(Here's one of the first medical journal articles to report this, Severe lactose intolerance with lactosuria and vomiting, by A. Hosková, et al.,