Having the shape of an arch or bow; curved like an arc.
From Latin 'arcus' (arch) + '-form' (having the form of); this descriptive term has been used in scientific and architectural contexts since the 18th century to describe curved shapes.
The word perfectly captures how scientists describe curved objects—if something is 'arciform,' you immediately picture a smooth, bow-like curve, like an eyebrow or a rainbow.
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