Noun has 2 senses

• frostweed(n = noun.plant) crocanthemum canadense, frost-weed, frostwort, helianthemum canadense - perennial of the eastern United States having early solitary yellow flowers followed by late petalless flowers; so-called because ice crystals form on it during first frosts;


• frostweed(n = noun.plant) frost-weed, verbesina virginica, virginia crownbeard - tall perennial herb having clusters of white flowers; the eastern United States;