Jisho

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Noun
1. homologue; homolog
Wikipedia definition
2. Homology (chemistry)In chemistry, homology refers to the appearance of homologues. A homologue (also spelled as homolog) is a compound belonging to a series of compounds differing from each other by a repeating unit, such as a methylene group, a peptide residue, etc. A homolog is a special case of an analog. Examples are alkanes and compounds with alkyl sidechains of different length (the repeating unit being a methylene group -CH2-).
Read “Homology (chemistry)” on English Wikipedia
Read “同族体” on Japanese Wikipedia
Read “Homology (chemistry)” on DBpedia

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