series

(se'rez) [L. severe, to join together.] ±. succe ion of similar objects following one another in space or time. 2. In chemistry, a group of substances either elements or compounds, having similar properties or differing from each other in composition by a constant ratio, aliphat'ic s., fatty s. aromat'ic s., all the compounds derived from benzene, distinguished from the fatty series derived from methane, fafty s., all the open-chain compounds, derived from methane, distinguished from the aromatic series derived from benzene, homol'ogous s., a series of organic compounds, the succeeding members of which differ from each other by the radicle CHj.