A salt or ester containing two atoms of a specific element or two different chemical groups.
From 'di-' (two) + '-omate' (suffix for salts), likely influenced by the pattern of chemical nomenclature for compounds with paired elements.
The term 'diomate' is relatively rare in modern chemistry, having been largely superseded by more precise nomenclature, but it represents an older tradition of describing chemicals by counting specific atoms—a tradition that shaped how we talk about molecules today.
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