From The Collaborative International Dictionary of English v.0.44 [gcide]:
Groundsel \Ground"sel\, noun [OE. grundswilie, AS. grundeswylige, grundeswelge, earlier gundiswilge; gund matter, pus + swelgan to swallow. So named as being good for a running from the eye. See {Swallow}, v.] (Bot.) An annual composite plant ({Senecio vulgaris}), one of the most common and widely distributed weeds on the globe.
From The Collaborative International Dictionary of English v.0.44 [gcide]:
Groundsel \Ground"sel\, Groundsill \Ground"sill'\, noun [Ground + sill.] See {Ground plate} (a), under {Ground}
From WordNet (r) 2.0 [wn]:
noun
1: Eurasian weed with heads of small yellow flowers [syn: {Senecio vulgaris}]
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