The Collaborative International Dictionary of English v.0.48:
Cress \Cress\ (kr[e^]s), n.; pl. Cresses (kr[e^]s"[e^]z). [OE.
ces, cresse, kers, kerse, AS. cresse, cerse; akin to D. kers,
G. kresse, Dan. karse, Sw. krasse, and possibly also to OHG.
chresan to creep.] (Bot.)
A plant of various species, chiefly cruciferous. The leaves
have a moderately pungent taste, and are used as a salad and
Note: The garden cress, called also peppergrass, is the
Lepidium sativum; the water cress is the Nasturtium
officinale. Various other plants are sometimes called
To strip the brook with mantling cresses spread.
Bitter cress. See under Bitter.
Not worth a cress, or "not worth a kers." a common old
proverb, now turned into the meaningless "not worth a