getæl-cræft

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getæl-cræft, m.n: arithmetic (literally ‘number-craft’ or ‘computation-craft’). (yeh-TAL-KRAFT / jɛ-ˈtæl-ˌkræft)

Medieval manuscript page with a series of shapes (triangles, squares, pentagons and hexagons) with Roman numerals marked on different parts of the shapes; below is writing in Latin.
Boethius’ De institutione arithmetica; France, mid 9th-early 10th century; Bibliothèque nationale de France, Latin 10251, f. 41r. [gallica.bnf.fr]

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