Entry 1 sense Webster, 1913 Nitrocellulose /nītˌ-rōs-ĕl'-yəl-ōsˌ/ · Ni·tro·cel·lu·lose · IPA /nˌaɪtroʊsˈɛljəlˌoʊs/ 01 n. See Gun cotton, under Gun. 1. See Gun cotton, under Gun.(Chem.) See: Gun