common name for a plant of the mustard family, Old English cresse, originally cærse, from Proto-Germanic *krasjon- (source also of Middle Low German kerse, karse; Middle Dutch kersse; Old High German kresso, German Kresse), from PIE root *gras- "to devour" (see gastric). It underwent a metathesis similar to that of grass. French cresson, Italian crescione are Germanic loan-words.
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