einsteinium

/aɪnˈstaɪni.əm/

AꞮNSTAꞮNI · əm (2 syllables)

English Noun

Definition

A transuranic chemical element (symbol Es) with atomic number 99: a soft, silvery, paramagnetic metal.

From Einstein + -ium. Named after Albert Einstein.

"Einsteinium, the 99th element of the periodic table, was discovered in the fallout of the first hydrogen bomb, detonated by the United States in the Marshall Islands on November 1, 1952."