biographical name

Ein·​stein ˈīn-ˌstīn How to pronounce Einstein (audio)
Albert 1879–1955 American (German-born) physicist
Einsteinian adjective

Cite this Entry

“Einstein.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/Einstein. Accessed 3 Dec. 2023.

Medical Definition


ein·​stein ˈīn-ˌstīn How to pronounce einstein (audio)
: the radiant energy of a given frequency required to effect the complete photochemical transformation of one mole of a photosensitive substance being equal to about 0.004 erg second times the frequency in question
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