† semendacyObs. [Corruption of mod.L. sēmen daucī (sēmen seed, daucī genit. of daucus some umbelliferous plant, perh. carrot or parsnip).] The seeds of the sweet chervil (Myrrhis odorata), formerly used in medicine. 1714Fr.Bk. of Rates 97 Semendacy per 100 Weight.