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| a white, crystalline, water-insoluble, powerful high explosive, C3H6N6O6, used chiefly in bombs and shells. |
| a white, crystalline, water-insoluble solid, C14H9Cl5, usually derived from chloral by reaction with chlorobenzene in the presence of fuming sulfuric acid: used as an insecticide and as a scabicide and pediculicide: agricultural use prohibited in the U.S. |
phenobarbital phe·no·bar·bi·tal (fē'nō-bär'bĭ-tôl', -tāl')
n.
A crystalline barbiturate used as a sedative, a hypnotic, and an anticonvulsant.
| phenobarbital (fē'nō-bär'bĭ-tôl', -tāl') Pronunciation Key
A crystalline barbiturate used as a sedative and an anticonvulsant. Chemical formula: C12H12N2O3. |