Having the shape of half an ellipse; shaped like an ellipse cut in half along its major or minor axis.
From Greek 'hemi-' (half) + 'elliptic' (derived from Greek 'elleipsis,' meaning 'omission' or 'falling short'). The word describes a geometric form that is exactly half of an elliptical shape.
Hemielliptic springs in cars and trucks work because that half-ellipse shape naturally distributes weight and impacts smoothly—engineers borrowed this shape from nature because it matches how beams bend under load.
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