hartree

== English == === Etymology === Named after the British physicist Douglas Hartree (1897–1958). === Noun === hartree (plural hartrees) The atomic unit of energy, defined as 2R∞hc, where R∞ is the Rydberg constant, h is the Planck constant and c is the speed of light. It equals 4.35974 attojoules. ==== Derived terms ==== === Anagrams === Earther, Raether, earther, reareth