1. Of or relating to or containing sulphur
   "sulphuric esters"
   - sulfuric [N. Amer]

See also: sulphur [Brit, Cdn]

• genus Uma
• genus Umbellularia
• genus Umbrina
• genus Unio
• genus Upupa
• genus Urginea
• genus Uria
• genus Urocyon
• genus Urocystis
• genus Urophycis
• genus Uropsilus
• genus Urosaurus
• genus Ursinia
• genus Ursus
• genus Urtica
• genus Usnea
• genus Ustilaginoidea
• genus Ustilago
• genus Uta
• genus Utahraptor
• genus Utricularia
• genus Uvularia
• genus Vaccaria
• genus Vaccinium
• genus Valeriana