a. [ L. alipes; ala wing + pes, pedis, foot: cf. F. alipède. ] (Zool.) Wing-footed, as the bat. --
a. [ Gr. &unr_;, &unr_;, oil, fat. ] (Org. Chem.) Of, pertaining to, or derived from, fat; fatty; -- applied to compounds having an open-chain structure. The aliphatic compounds thus include not only the fatty acids and other derivatives of the paraffin hydrocarbons, but also unsaturated compounds, as the ethylene and acetylene series. Compare