Толковый словарь английского языка - multiplicity

noun (plural -ties) Etymology: Middle English, from Middle French multiplicité, from Late Latin multiplicitat-, multiplicitas, from Latin multiplic-, multiplex Date: 15th century 1. the quality or state of being multiple or various, the number of components in a system (as a multiplet or a group of energy levels), a great number, the number of times a root of an equation or zero of a function occurs when there is more than one root or zero