pastinacineChem.|pæstɪˈneɪsaɪn| [f. L. pastināca parsnip + -ine5.] The name given by Wittstein to a volatile alkaloid distilled from the seeds of the parsnip; also found in the root of the broad-leaved water-parsnip (Sium latifolium). 1866–77Watts Dict.Chem. IV. 357. 1881Ibid. 3rd Suppl. 1497.