Chem. [f. XYL-ENE + -YL.] The hypothetical radical (C8H9) of xylene and its derivatives. Hence Xylylamine, Xylylene, † Xylylea (= xylylamine), Xylylic a., etc.: see quots.
1862. Miller, Elem. Chem., Org., vi. § 2. (ed. 2), 453. Xylol, C16H10. Nitroxylol, C16H9NO4. Xylylia, C16H11N.
1863. Fownes’ Chem. (ed. 9), 694. The hydrate of oxide of xylyl … has been observed by Mr. H. Müller.
1868. Watts, Dict. Chem., V. 1061. Xylyl. C8H9. A monatomic radicle, homologous with phenyl and tolyl, which may be supposed to exist in xylene … and its derivatives. Ibid., Xylylamine … a base … (not yet obtained), related to benzylamine … as xylidine … to toluidine. Ibid., Xylylene. C8H8. A diatomic radicle related to xylyl, C8H9, in the same way as ethylene to ethyl. Ibid., 1062. Xylylic acid. C9H10O2 = C6H3 (CH3)2.CO2H…. homologous with benzoic and toluic acids. Ibid., Xylylic acetate, chloride, &c. Syn. with Toluylic Acetate, Chloride, &c.
