palminChem.|ˈpælmɪn| [ad. F. palmine (Boudet 1832), f. L. palma (in Palma Christi) + -in.] A fatty substance obtained on treating castor-oil with nitric peroxide. Now called ricinelaïdin. 1838T. Thomson Chem.Org. Bodies 431 Palmin is very soluble in alcohol and in ether.