Definition of heteroatom in English:

heteroatom

Syllabification: het·er·o·at·om
Pronunciation: /ˌhedərōˈadəm/

Entry from US English dictionary

noun

An atom in the ring of a cyclic compound other than a carbon atom.

Derivatives

heteroatomic

Pronunciation: /-əˈtämik/
adjective

Definition of heteroatom in:

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Word of the day anomalous
Pronunciation: əˈnämələs
adjective
deviating from what is standard, normal, or expected