Submitted by György Chityil ... on Fri, 01/19/2018 - 18:05 Hierarchy: Proper NounDescription: {{pharmaceutical drug}} A mixture of nitrous oxide and oxygen used as an analgesic, especially during labour.Ngram: EntonoxNgram Text: EntonoxSource: WiktionaryIssue: 0Wiktionary tag: pharmaceutical drugNgram Count: 1