macroscopicity

== English == === Etymology === From macroscopic + -ity. === Noun === macroscopicity (countable and uncountable, plural macroscopicities) (uncountable) The quality or state of being macroscopic. (countable, quantum mechanics) A formal measure of the size of a quantum mechanical system or experiment which, while typically larger than the atomic scale, has not undergone decoherence. 2014, M. Arndt, et al., Matter wave interferometry with composite quantum objects, G. M. Tino, M. A. Kasevich (editors), Interferometria atomica, Società Italiana di Fisica, [jointly published as Atom Interferometry, IOS Press], page 136, Macroscopicities for a selection of neutron, atom, molecule and SQUID superposition experiments ordered according to their publication date.