Source : WordNet®

corn mayweed
     n 1: ubiquitous European annual weed with white flowers and
          finely divided leaves naturalized and sometimes
          cultivated in eastern North America; sometimes included
          in genus Matricaria [syn: {scentless camomile}, {scentless
          false camomile}, {scentless mayweed}, {scentless hayweed},
           {Tripleurospermum inodorum}, {Matricaria inodorum}]
     2: European white-flowered weed naturalized in North America
        [syn: {corn chamomile}, {field chamomile}, {Anthemis
        arvensis}]