Noun frostweed has 2 senses
- frostweed, frost-weed, frostwort, Helianthemum canadense, Crocanthemum canadensei - 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
--1 is a kind of helianthemum, sunrose, sun rose
- Virginia crownbeard, frostweed, frost-weed, Verbesina virginica - tall perennial herb having clusters of white flowers; the eastern United States
--2 is a kind of crownbeard, crown-beard, crown beard
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