noun
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
• Syn: ↑frostweed, ↑frost-weed, ↑frostwort, ↑Helianthemum canadense
• Hypernyms: ↑helianthemum, ↑sunrose, ↑sun rose
Useful english dictionary. 2012.