isologous Meaning, Definition & Usage

I*sol"o*gous adjective
Etymology
Iso- + Gr. proportion.
Definitions
  1. (Chem.) Having similar proportions, similar relations, or similar differences of composition; -- said specifically of groups or series which differ by a constant difference; as, ethane, ethylene, an acetylene, or their analogous compounds, form an isologous series.

Webster 1913