Definition of "einstein" in Englisch

noun

1. (photochemistry, dated) One mole of photons, regardless of frequency, as used to measure irradiance.

   • The einstein (symbol E) is an obsolete unit with two conflicting definitions.

2. (informal) A genius; a very smart person.

   • He's a prodigy — they call him their little einstein.

noun

1. (mathematics, physics) A shape that can be repeated to cover a plane with a nonrepeating pattern.