| benzene | (noun) a colorless liquid hydrocarbon; highly flammable; carcinogenic; the simplest of the aromatic compounds | Synonyms: benzine, benzol |
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| benzine | (noun) a colorless liquid hydrocarbon; highly flammable; carcinogenic; the simplest of the aromatic compounds | Synonyms: benzene, benzol |
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| benzoate | (noun) any salt or ester of benzoic acid | - |
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| benzocaine | (noun) a white crystalline ester used as a local anesthetic | Synonyms: ethyl aminobenzoate |
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| benzodiazepine | (noun) any of several similar lipophilic amines used as tranquilizers or sedatives or hypnotics or muscle relaxants; chronic use can lead to dependency | - |
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| benzofuran | (noun) a colorless oily compound extracted from coal tar and used in manufacturing synthetic resins | Synonyms: coumarone, cumarone |
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| benzoin | (noun) gum resin used especially in treating skin irritation | Synonyms: asa dulcis, benjamin, gum benjamin, gum benzoin |
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| benzol | (noun) a colorless liquid hydrocarbon; highly flammable; carcinogenic; the simplest of the aromatic compounds | Synonyms: benzene, benzine |
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| benzoquinone | (noun) any of a class of aromatic yellow compounds including several that are biologically important as coenzymes or acceptors or vitamins; used in making dyes | Synonyms: quinone |
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| benzyl | (noun) the univalent radical derived from toluene | Synonyms: benzyl group, benzyl radical |
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| benzylpenicillin | (noun) the penicillin that constitutes the principal component of many commercial antibiotics | Synonyms: penicillin G |
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