A downward curving or bending; the state or quality of being curved downward.
From Latin 'decurvatura', derived from 'decurvare' (to bend down), with the '-ure' suffix indicating a state or quality of being.
The decurvature of a bird's beak or the decurvature of a water drop clinging to a leaf shows how nature creates curves not through sharp angles but through smooth, downward bending.
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