A person who specializes in creating categories or classifications, especially in philosophy or science.
From categor- (from category) plus -ist (one who practices or specializes in). A rare word reflecting the idea of someone whose expertise is in systematic classification.
Aristotle was perhaps history's first great categorist, organizing everything from animals to virtues—though the term itself is rarely used because 'taxonomist' and 'librarian' have largely taken its place in modern usage.
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