A chief or master typographer; a leading figure in the design and arrangement of printed type and text.
From 'archi-' (chief) combined with 'typographer' (one who arranges type). This is a constructed term blending classical Greek prefix with modern printing terminology to denote a preeminent figure in typography.
This is a word you'll almost never encounter because the printing world rarely needs a word for 'super-typographer'—it's the kind of logical but practically unused word that shows how English could theoretically create an 'arch-' version of almost any profession.
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