A person who dyes materials, particularly in a commercial or industrial setting; a professional dyer.
From dye plus -ster (a suffix indicating one who practices something), an alternative formation to the more common -er. This variant appears in historical textile records and retains an older English suffix pattern.
Dyester is an older, more formal term that shows up in medieval guild records—when cities wanted to regulate who could dye fabrics, they'd have rules about how many dyesters could operate in one area.
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