| mayweed | (n) widespread rank-smelling weed having white-rayed flower heads with yellow discs, Syn. stinking mayweed, stinking chamomile, Anthemis cotula, dog fennel |
| corn chamomile | (n) European white-flowered weed naturalized in North America, Syn. Anthemis arvensis, field chamomile, corn mayweed |
| scentless camomile | (n) 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. Matricaria inodorum, scentless hayweed, corn mayweed, scentless false camomile, Tripleurospermum inodorum, scentless mayweed |
| Mayweed | n. (Bot.) |