'Frostwort' definitions:
Definition of 'frostwort'
(from WordNet)
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, Crocanthemum canadense]