A practitioner or expert in basilysis, or a specialist in studying or working with base compounds in chemistry.
From basilysis (basis + lysis) plus '-ist' (one who practices or specializes in). This is a theoretical professional term.
A basilyst would be a hyper-specialized chemist, but this word is so rare that you'd never see a job listing for one—it's a ghost word created by predictable word-building rules that nobody actually adopted.
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