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Medical Definition of Ethenylbenzene
1. C6H5CH==CH2; phenylethylene;the monomer from which polystyrenes, plastics, and synthetic rubber are made; together with divinylbenzene (for cross-linking), it is the basis of many synthetic ion exchangers. Synonym: cinnamene, ethenylbenzene, styrol, vinylbenzene. (05 Mar 2000)