supernumerary (adj.) Look up supernumerary at Dictionary.com
"exceeding a stated number," c.1600, from Late Latin supernumarius "excess, counted in over" (of soldiers added to a full legion), from Latin super numerum "beyond the number," from super "beyond, over" (see super-) + numerum, accusative of numerus "number" (see number (n.)). As a noun from 1630s.