<unk> may refer to: *<unk>  a human skin condition *<unk> (hydrozoan), a genus of marine invertebrates in the family Prayidae * Quercus ×<unk>  a tree hybrid between Quercus petraea and Quercus robur Not to be confused with: *<unk> , a family of plants
Rosacea 
Ocular rosacea
Steroid rosacea
Pomade acne
Ichthyosis vulgaris
Vitiligo
Eyelid dermatitis
Lip licker's dermatitis