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
   - frostweed, frost-weed, frostwort, Crocanthemum canadense

Type of: helianthemum, sun rose, sunrose

• ubersexual
• ubiety
• ubiquinone
• ubiquitous
• ubiquitously
• ubiquitousness
• ubiquity
• Ubykh
• UC
• Uca
• UCAS
• UDA
• udder
• Udmurt
• udometer
• UEFA
• Uey
• Ufa
• UFO
• ufology
• Uganda
• Ugandan
• Ugandan monetary unit
• Ugandan shilling
• Ugaritic