hydroxybenzene
- n a toxic white soluble crystalline acidic derivative of benzene; used in manufacturing and as a disinfectant and antiseptic; poisonous if taken internally
hydroxychloroquine
- n anti-inflammatory drug (trade name Plaquenil) used in the treatment of rheumatoid arthritis and malaria and lupus erythematosus
hydroxyl
- n the monovalent group -OH in such compounds as bases and some acids and alcohols
hydroxyl group
- n the monovalent group -OH in such compounds as bases and some acids and alcohols
hydroxyl radical
- n the monovalent group -OH in such compounds as bases and some acids and alcohols
hydroxymethyl
- n a methyl with hydroxide replacing the hydrogen atoms
hydroxyproline
- n a crystalline amino acid obtained from gelatin or collagen
hydroxytetracycline
- n a yellow crystalline antibiotic (trademark Terramycin) obtained from a soil actinomycete; used to treat various bacterial and rickettsial infections
hydroxyzine
- n a drug (trade names Atarax and Vistaril) used as a tranquilizer to treat anxiety and motion sickness
hydroxyzine hydrochloride
- n a drug (trade names Atarax and Vistaril) used as a tranquilizer to treat anxiety and motion sickness
hydrozoa
- n coelenterates typically having alternation of generations; hydroid phase is usually colonial giving rise to the medusoid phase by budding: hydras and jellyfishes
- n colonial coelenterates having the polyp phase dominant
hydrus
- n a constellation in the southern hemisphere near the south celestial pole