noun ·Rare ·Advanced level

Definitions

Noun

1. 1
   An American species of rockrose (Crocanthemum canadense, syn. Helianthemum canadense). countable, uncountable
2. 2
   tall perennial herb having clusters of white flowers; the eastern United States wordnet
3. 3
   Verbesina virginica (white crownbeard) countable, uncountable
4. 4
   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 wordnet

Synonyms

All synonyms

frostwortcrocanthemum canadensefrost weedfrost-weedfrostworthelianthemum canadense

Etymology

From frost + weed. Late in autumn, crystals of ice shoot from the cracked bark at the root.

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.