Source : Webster's Revised Unabridged Dictionary (1913)

Chafeweed \Chafe"weed`\, n. (Bot.)
   The cudweed ({Gnaphalium}), used to prevent or cure chafing.

Source : WordNet®

chafeweed
     n : weedy perennial of north temperate regions having woolly
         foliage and dirty white flowers in a leafy spike [syn: {wood
         cudweed}, {Gnaphalium sylvaticum}]