1. 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
   - frost-weed, frostwort, Helianthemum canadense, Crocanthemum canadense 
2. Tall perennial herb having clusters of white flowers; the eastern United States
   - Virginia crownbeard, frost-weed, Verbesina virginica

Derived forms: frostweeds, frost-weeds

Type of: crown beard, crownbeard, crown-beard, helianthemum, sun rose, sunrose

• Horace Walpole
• horal
• horary
• Horatian ode
• Horatio Alger
• Horatio Herbert Kitchener
• Horatio Hornblower
• Horatio Nelson
• Horatio Walpole
• horde
• hordeolum
• Hordeum
• Hordeum jubatum
• Hordeum murinum
• Hordeum pusillum
• Hordeum vulgare
• horehound
• horizon
• horizontal
• horizontal bar
• horizontal combination
• horizontal integration
• horizontal parallax
• horizontal section
• horizontal stabiliser