In a convex manner; with a curved-outward shape or in the direction of a convex surface.
Convexed + -ly (adverbial suffix). A rare adverbial formation from the rarely-used 'convexed,' creating a word that's doubly uncommon.
This word exists theoretically in English morphology but almost never appears in real writing—it's the kind of word a student might invent on a grammar test that's technically correct but practically never used.
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