(of two or more organic compounds) having a similar structure but containing different atoms of the same valency
Derived forms
isologue (ˈaɪsəʊˌlɒɡ)
noun
Word origin
C19: from iso- + (homo)logous
isologous in American English
(aɪˈsɑləgəs)
adjective
1.
designating or of any of two or more chemical compounds of similar structure but consisting of different atoms of the same valence and usually of the same periodic group
2.
designating or of a series formed by such compounds