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a series of organic compounds, the succeeding members of which differ from each other by the moiety CH2 (as in the fatty series).
In chemistry, compounds that proceed from one to the next by some constant such as a CH2 group.
See also: series
homologous series (h·mˑ·l·gs sirˑ·ēz),
n compounds that have the same general formula and similar properties (physical and chemical) but differ by the number of methylene groups.