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diphenylhydantoin

[dahy-fen-l-hahy-dan-toh-in, -feen-]
noun Pharmacology.
  1. a white, slightly water-soluble powder, C15H11N2O2, used in the form of its sodium salt to prevent or arrest convulsions in epilepsy.
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Origin of diphenylhydantoin

First recorded in 1935–40; diphenyl + hydantoin
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018