congener

Concise Oxford English Dictionary © 2008 Oxford University Press:
congener /ˈkɒndʒɪnə, kənˈdʒiːnə/

▶noun

• 1 a person or thing of the same kind as another.

  ■ an animal or plant of the same genus as another.

• 2 a minor chemical constituent, especially one giving a distinctive character to a wine or spirit.

– derivatives
congeneric /ˌkɒndʒɪˈnɛrɪk/ adjective,
congenerous /kənˈdʒɛn(ə)rəs/ adjective.

– origin C18: from L., from con- ‘together with’ + genus, gener- ‘race, stock’.