noun. an animal or plant that bears a relationship to another (as related by common descent or by membership in the same genus).
noun. a whole (a thing or person) of the same kind or category as another.
noun. a minor chemical constituent that gives a wine or liquor its distinctive character.
Example sentences of the word congener
1. Noun, singular or mass
One type of congener called methanol can worsen a hangover by breaking down into the toxins formaldehyde and formic acid, per the Mayo Clinic.