Noun frostwort has 1 sense
  1. 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
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