Answer:

einstein

AnswerCrossword Clue
EINSTEINBrainiac
EINSTEINPhysicist who published four groundbreaking articles in 1905
EINSTEINElement 99 was named for him
EINSTEINAuthor of the "Annus Mirabilis" papers
EINSTEINBrain
EINSTEINTime's Person of the Century, 1999
EINSTEINGerman genius
EINSTEINGenius
EINSTEINRelativity researcher
EINSTEINMensa member?
EINSTEINName synonymous with genius
EINSTEIN"... on the Beach" (Philip Glass's first opera)
EINSTEINMatthau's "I.Q." role
EINSTEINRelativity name
EINSTEINBig name in physics
EINSTEINMass-energy equation formulator
EINSTEINNoted Princetonian.
EINSTEINRenowned physicist.
EINSTEINSage of Princeton.
EINSTEINScientist at Princeton.
EINSTEINHis figures are out of this world.
EINSTEINU.S. citizen since 1940.
EINSTEIN1921 Nobel prize winner.
EINSTEINGreat name in physics.
EINSTEINGreat theoretical physicist.
EINSTEINGreat name in science.
EINSTEINCo-worker of Bohr, Fermi, etc.
EINSTEINFamous physicist.
EINSTEINAuthor of Stepquote
EINSTEINReal brain
EINSTEIN'21 Nobelist
EINSTEINA genius, relatively speaking
EINSTEINHe was a genius, relatively speaking
EINSTEINAlbert, the genius
EINSTEINBrainy one?
EINSTEINHe equated mass to energy
EINSTEINPhysics giant
EINSTEINDeveloper of the theory of relativity
EINSTEINA genius, relatively speaking?
EINSTEINTime magazine's Person of the Century