In mathematics and geometry, relating to figures or objects that are congruent or agreeing in all parts; fitting together perfectly.
From Latin 'congrediens' (going together), combining 'con-' (together) and 'gradiens' (stepping, going), referring to things that step or go together harmoniously.
This is a super technical term mostly used in mathematics, but it's fascinating because it literally means 'going together'—two shapes are congredient when they fit together as if they were made to match.
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