Einsteins

'Einsteins'

[einstein.n.01] as in: physicist born in Germany who formulated the special theory of relativity and the general theory of relativity; Einstein also proposed that light consists of discrete quantized bundles of energy (later called photons) (1879-1955)

'Einsteins'

[genius.n.01] as in: someone who has exceptional intellectual ability and originality

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Examples:
Mozart was a child genius
he's smart but he's no Einstein