apiolChem. and Med.|ˈeɪpɪɒl| [f. L. api-um parsley + -ol.] A crystalline substance obtained by distilling parsley seeds with water; parsley-camphor. (Watts Dict.Chem. VIII. 118.) 1872in Thomas Dis. Wom. 577. 1875 H. Wood Therap. (1879) 538 Apiol..as a remedy in intermittent fever.