/waw"teuhr kres', wot"euhr-/ , n.
1. a cress, Nasturtium officinale, of the mustard family, usually growing in clear, running streams and having pungent leaves.
2. the leaves, used for salads, soups, and as a garnish.
[ 1300-50; ME; c. MD, MLG waterkerse. See WATER, CRESS ]